{"title":"Reservoir Heaters","description":"\u003cp\u003eA reservoir heater keeps your nutrient solution at a stable temperature, which matters most in cold rooms, garages and winter grows. This collection includes Dutch Masters reservoir heaters of 100, 200, 300 and 500W and the Aquaking Tank Heater HE-500W for tanks of 300 to 500 litres. As a rule, choose more wattage for larger volumes and colder surroundings. Place the heater fully submerged and away from the tank wall, and use a thermometer to check the actual temperature. Find tanks in \u003ca href=\"\/collections\/flexible-wassertanks\"\u003eflexible water tanks\u003c\/a\u003e and pumps to keep the water moving in \u003ca href=\"\/collections\/tauchpumpen\"\u003esubmersible pumps\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"aquaking-fassheizung-he-500w-300-bis-500-liter","title":"Aquaking Tank Heater HE-500W – 300 to 500 Litres","description":"\u003ch2\u003eAquaking Tank Heater HE-500W – 300 to 500 Litres: product details and use\u003c\/h2\u003e\u003cp\u003eThe Aquaking Tank Heater HE-500W is a reliable and powerful solution for heating water in barrels, IBC containers, nutrient tanks or aquariums. It was developed specifically for containers of around 300 to 500 litres and is ideal for use in hydroponic systems, indoor grow setups, greenhouses and aquaculture.\u003c\/p\u003e\u003cp\u003eThe heater is equipped with a high-quality stainless steel heating element. This material is corrosion-resistant, durable and suitable for permanent use in water, so heating performance stays constant and reliable even with long-term use.\u003c\/p\u003e\u003cp\u003eAn integrated digital temperature controller with an external, waterproof temperature probe allows precise control of the water temperature. The temperature range can be set flexibly between 20 °C and 34 °C. The system monitors the temperature continuously and adjusts automatically to keep the set value constant.\u003c\/p\u003e\u003cp\u003eThanks to its compact design, the Aquaking Tank Heater HE-500W is easy to install and can be used flexibly in different containers. It is particularly suited to medium-sized water and nutrient tanks, although the volume that can actually be heated depends on the ambient temperature and the insulation of the container.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cp\u003eModel: Aquaking Tank Heater HE-500W\u003cbr\u003ePower: 500 watts\u003cbr\u003eVoltage: 220–240 V \/ 50–60 Hz\u003cbr\u003eTemperature range: adjustable from 20 °C to 34 °C\u003cbr\u003eTemperature controller: digital, external with LED display\u003cbr\u003eTemperature probe: external, waterproof\u003cbr\u003eHeating element: stainless steel\u003cbr\u003eCable length: approx. 1.5 to 2 metres\u003cbr\u003eApplication: indoor, greenhouse, grow room, aquariums, hydroponics\u003cbr\u003eSuitable for: water containers of approx. 300 to 500 litres\u003c\/p\u003e\u003ch3\u003eInstructions for use\u003c\/h3\u003e\u003cp\u003ePlace the heater fully in the water, preferably in a horizontal position.\u003cbr\u003eFit the temperature probe separately in the water and do not place it directly next to the heating element.\u003cbr\u003eSet the desired temperature on the digital controller.\u003cbr\u003eConnect the unit to the mains – the heater starts automatically and regulates itself.\u003cbr\u003eRegular checking and cleaning of the heating element extends its lifespan.\u003cbr\u003eOnly operate the unit in water and never use it dry.\u003c\/p\u003e","brand":"Aquaking","offers":[{"title":"Default Title","offer_id":58588838134104,"sku":"C8HOR05402","price":32.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1016\/9584\/8792\/files\/v1020001-a_2-e1770307504886.jpg?v=1790619889"},{"product_id":"dutch-masters-fassheizung-100w","title":"Dutch Masters Reservoir Heater 100W","description":"\u003ch2\u003eDutch Masters Reservoir Heater 100W: product details and use\u003c\/h2\u003e\u003cp\u003eThe water temperature in the reservoir is one of the most underestimated factors in indoor growing. If the nutrient solution drops below about 18 °C, the plant's metabolism slows noticeably, nutrient uptake through the roots becomes less efficient and the risk of root rot and other pathogens rises, because cold water behaves differently from warm water in terms of oxygen and nutrient solution.\u003c\/p\u003e\u003cp\u003eThe Dutch Masters Water Heater 100W was developed to solve exactly this problem: it keeps the reservoir temperature stable regardless of fluctuations in room temperature, as typically occur in cellars, tents or unheated grow rooms during the colder months.\u003c\/p\u003e\u003cp\u003eAs an \u003ca href=\"\/collections\/fassheizungen\"\u003eimmersion heater\u003c\/a\u003e, the unit is fully submerged in the nutrient solution or irrigation water. An \u003cstrong\u003eintegrated thermostat\u003c\/strong\u003e regulates the heating output automatically, so the set target temperature is maintained without constant manual adjustment. This reduces temperature swings that would otherwise stress the root system and creates a more stable environment for microorganisms and nutrient availability in the root zone.\u003c\/p\u003e\u003ch3\u003eUse\u003c\/h3\u003e\u003cp\u003eThe Water Heater 100W is suitable for use in irrigation system reservoirs and in nutrient solution tanks for hydro set-ups (e.g. DWC, ebb and flow, recirculating systems). The heater can also be used when preparing irrigation water for soil or coco, to bring tap water that is too cold up to room temperature before use.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003e100 W\u003c\/strong\u003e rating is designed for small to medium-sized reservoirs; for larger volumes of water or very cool ambient temperatures, a more powerful model or several heaters may be advisable. As with all immersion heaters, the unit must only be operated when fully submerged.\u003c\/p\u003e\u003cp\u003eThe Water Heater can be used with any nutrient brand, as it only affects the water temperature and does not interact with nutrients or additives. It can therefore be combined without any problems with Dutch Masters nutrients or products from other manufacturers.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit type:\u003c\/strong\u003e immersion heater (reservoir\/water heater)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 100 watts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e hydro reservoirs, irrigation tanks, irrigation water for soil\/coco\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e automatic temperature control via thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e fully waterproof, for continuous use in the reservoir\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor exact details on voltage, temperature range and maximum reservoir size, we recommend consulting the manufacturer's data sheet or packaging.\u003c\/p\u003e","brand":"GrowDealz","offers":[{"title":"Default Title","offer_id":58588880077144,"sku":"C8DMH33086","price":10.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1016\/9584\/8792\/files\/ef35bb10-28a4-4417-bc12-b09a39202aec.jpg?v=1790620173"},{"product_id":"dutch-masters-fassheizung-200w","title":"Dutch Masters Reservoir Heater 200W","description":"\u003ch2\u003eDutch Masters Reservoir Heater 200W: product details and use\u003c\/h2\u003e\u003ch3\u003eConstant water temperature for healthy roots\u003c\/h3\u003e The water temperature in the reservoir is one of the most underestimated factors in indoor growing. If the nutrient solution drops below about 18 °C, the plant's metabolism slows noticeably, nutrient uptake through the roots becomes less efficient and the risk of root rot and other pathogens rises, because cold water behaves differently from warm water in terms of oxygen and nutrient solution. The Dutch Masters Water Heater 200W was developed to solve exactly this problem: it keeps the reservoir temperature stable regardless of fluctuations in room temperature, as typically occur in cellars, tents or unheated grow rooms during the colder months. As an immersion heater, the unit is fully submerged in the nutrient solution or irrigation water. An integrated thermostat regulates the heating output automatically, so the set target temperature is maintained without constant manual adjustment. This reduces temperature swings that would otherwise stress the root system and creates a more stable environment for microorganisms and nutrient availability in the root zone. Use: the Water Heater 200W is suitable for use in irrigation system reservoirs and in nutrient solution tanks for hydro set-ups (e.g. DWC, ebb and flow, recirculating systems). The heater can also be used when preparing irrigation water for soil or coco, to bring tap water that is too cold up to room temperature before use. The 200 W rating is designed for medium-sized reservoirs; for larger volumes of water or very cool ambient temperatures, a more powerful model or several heaters may be advisable. As with all immersion heaters, the unit must only be operated when fully submerged. The Water Heater can be used with any nutrient brand, as it only affects the water temperature and does not interact with nutrients or additives. It can therefore be combined without any problems with Dutch Masters nutrients or products from other manufacturers. \u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eUnit type: immersion heater (reservoir\/water heater)\u003c\/li\u003e\n\u003cli\u003ePower: 200 watts\u003c\/li\u003e\n\u003cli\u003eApplication: hydro reservoirs, irrigation tanks, irrigation water for soil\/coco\u003c\/li\u003e\n\u003cli\u003eFunction: automatic temperature control via thermostat\u003c\/li\u003e\n\u003cli\u003eConstruction: fully waterproof, for continuous use in the reservoir\u003c\/li\u003e\n\u003c\/ul\u003e For exact details on voltage, temperature range and maximum reservoir size, we recommend consulting the manufacturer's data sheet or packaging.","brand":"Dutch Masters","offers":[{"title":"Default Title","offer_id":58588880109912,"sku":"C8DMH33081","price":13.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1016\/9584\/8792\/files\/ef35bb10-28a4-4417-bc12-b09a39202aec_5d6d6b40-db34-4401-bf82-adfb5902e404.jpg?v=1790620174"},{"product_id":"dutch-masters-fassheizung-300w","title":"Dutch Masters Reservoir Heater 300W","description":"\u003ch2\u003eDutch Masters Reservoir Heater 300W: product details and use\u003c\/h2\u003e\u003ch3\u003eConstant water temperature for healthy roots\u003c\/h3\u003e The water temperature in the reservoir is one of the most underestimated factors in indoor growing. If the nutrient solution drops below about 18 °C, the plant's metabolism slows noticeably, nutrient uptake through the roots becomes less efficient and the risk of root rot and other pathogens rises, because cold water behaves differently from warm water in terms of oxygen and nutrient solution. The Dutch Masters Water Heater 300W was developed to solve exactly this problem: it keeps the reservoir temperature stable regardless of fluctuations in room temperature, as typically occur in cellars, tents or unheated grow rooms during the colder months. As an immersion heater, the unit is fully submerged in the nutrient solution or irrigation water. An integrated thermostat regulates the heating output automatically, so the set target temperature is maintained without constant manual adjustment. This reduces temperature swings that would otherwise stress the root system and creates a more stable environment for microorganisms and nutrient availability in the root zone. Use: the Water Heater 300W is suitable for use in irrigation system reservoirs and in nutrient solution tanks for hydro set-ups (e.g. DWC, ebb and flow, recirculating systems). The heater can also be used when preparing irrigation water for soil or coco, to bring tap water that is too cold up to room temperature before use. The 300 W rating is designed for medium to large reservoirs; for even larger volumes of water or very cool ambient temperatures, a more powerful model or several heaters may be advisable. As with all immersion heaters, the unit must only be operated when fully submerged. The Water Heater can be used with any nutrient brand, as it only affects the water temperature and does not interact with nutrients or additives. It can therefore be combined without any problems with Dutch Masters nutrients or products from other manufacturers. \u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eUnit type: immersion heater (reservoir\/water heater)\u003c\/li\u003e\n\u003cli\u003ePower: 300 watts\u003c\/li\u003e\n\u003cli\u003eApplication: hydro reservoirs, irrigation tanks, irrigation water for soil\/coco\u003c\/li\u003e\n\u003cli\u003eFunction: automatic temperature control via thermostat\u003c\/li\u003e\n\u003cli\u003eConstruction: fully waterproof, for continuous use in the reservoir\u003c\/li\u003e\n\u003c\/ul\u003e For exact details on voltage, temperature range and maximum reservoir size, we recommend consulting the manufacturer's data sheet or packaging.","brand":"Dutch Masters","offers":[{"title":"Default Title","offer_id":58588880142680,"sku":"C8DMH33082","price":12.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1016\/9584\/8792\/files\/ef35bb10-28a4-4417-bc12-b09a39202aec_e998c744-a243-4e35-90a2-5f08965d3bde.jpg?v=1790620174"},{"product_id":"dutch-masters-fassheizung-500w","title":"Dutch Masters Reservoir Heater 500W","description":"\u003ch2\u003eDutch Masters Reservoir Heater 500W: product details and use\u003c\/h2\u003e\u003ch3\u003eConstant water temperature for healthy roots\u003c\/h3\u003e The water temperature in the reservoir is one of the most underestimated factors in indoor growing. If the nutrient solution drops below about 18 °C, the plant's metabolism slows noticeably, nutrient uptake through the roots becomes less efficient and the risk of root rot and other pathogens rises, because cold water behaves differently from warm water in terms of oxygen and nutrient solution. The Dutch Masters Water Heater 500W was developed to solve exactly this problem: it keeps the reservoir temperature stable regardless of fluctuations in room temperature, as typically occur in cellars, tents or unheated grow rooms during the colder months. As an immersion heater, the unit is fully submerged in the nutrient solution or irrigation water. An integrated thermostat regulates the heating output automatically, so the set target temperature is maintained without constant manual adjustment. This reduces temperature swings that would otherwise stress the root system and creates a more stable environment for microorganisms and nutrient availability in the root zone. Use: the Water Heater 500W is suitable for use in irrigation system reservoirs and in nutrient solution tanks for hydro set-ups (e.g. DWC, ebb and flow, recirculating systems). The heater can also be used when preparing irrigation water for soil or coco, to bring tap water that is too cold up to room temperature before use. The 500 W rating is designed for large reservoirs; for very large volumes of water or very cool ambient temperatures, using several heaters may be advisable. As with all immersion heaters, the unit must only be operated when fully submerged. The Water Heater can be used with any nutrient brand, as it only affects the water temperature and does not interact with nutrients or additives. It can therefore be combined without any problems with Dutch Masters nutrients or products from other manufacturers. \u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eUnit type: immersion heater (reservoir\/water heater)\u003c\/li\u003e\n\u003cli\u003ePower: 500 watts\u003c\/li\u003e\n\u003cli\u003eApplication: hydro reservoirs, irrigation tanks, irrigation water for soil\/coco\u003c\/li\u003e\n\u003cli\u003eFunction: automatic temperature control via thermostat\u003c\/li\u003e\n\u003cli\u003eConstruction: fully waterproof, for continuous use in the reservoir\u003c\/li\u003e\n\u003c\/ul\u003e For exact details on voltage, temperature range and maximum reservoir size, we recommend consulting the manufacturer's data sheet or packaging.","brand":"Dutch Masters","offers":[{"title":"Default Title","offer_id":58588880175448,"sku":"C8DMH33083","price":15.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1016\/9584\/8792\/files\/ef35bb10-28a4-4417-bc12-b09a39202aec_ce7d45d1-d7eb-407e-ba1c-91af92a614c2.jpg?v=1790620175"}],"url":"https:\/\/growdealz.com\/collections\/fassheizungen.oembed","provider":"Growdealz","version":"1.0","type":"link"}