{"product_id":"adjustable-submersible-aquarium-heater","title":"Adjustable Submersible Aquarium Heater | 25W–300W Thermostat Heating Rod for Fish Tanks | NAUTILUS AND CO.","description":"\u003ch2\u003ePrecise Temperature Control for Every Tank Size\u003c\/h2\u003e\u003cp\u003eMaintain the perfect water temperature for your fish, corals, and aquatic plants with this adjustable submersible thermostat heater. Available in 5 power levels from 25W to 300W, it's engineered for reliable performance in freshwater and saltwater tanks of all sizes.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFully adjustable thermostat — dial in your exact target temperature\u003c\/li\u003e\n\u003cli\u003e5 power options (25W, 50W, 100W, 200W, 300W) — matched to your tank volume\u003c\/li\u003e\n\u003cli\u003e110-120V US plug — no adapter needed\u003c\/li\u003e\n\u003cli\u003eFully submersible quartz glass tube — shatter-resistant and safe\u003c\/li\u003e\n\u003cli\u003eLED indicator light — shows when heater is actively heating\u003c\/li\u003e\n\u003cli\u003eAuto shut-off protection — prevents overheating\u003c\/li\u003e\n\u003cli\u003eCompatible with freshwater and saltwater aquariums\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhich Wattage Do I Need?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e25W\u003c\/strong\u003e — nano and small tanks up to 8 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50W\u003c\/strong\u003e — small tanks, 8–20 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100W\u003c\/strong\u003e — medium tanks, 20–40 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e200W\u003c\/strong\u003e — large tanks, 40–75 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e300W\u003c\/strong\u003e — extra-large tanks and aquascapes, 75–120 gallons\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cp\u003eVoltage: 110-120V (US) | Power: 25W \/ 50W \/ 100W \/ 200W \/ 300W | Fully submersible | Compatible with freshwater and saltwater aquariums | Material: Quartz glass\u003c\/p\u003e","brand":"NAUTILUS AND CO.","offers":[{"title":"300W","offer_id":49066775216350,"sku":"AHTR-300W","price":39.99,"currency_code":"USD","in_stock":true},{"title":"25W","offer_id":49066775249118,"sku":"AHTR-25W","price":24.99,"currency_code":"USD","in_stock":true},{"title":"50W","offer_id":49066775281886,"sku":"AHTR-50W","price":27.99,"currency_code":"USD","in_stock":true},{"title":"100W","offer_id":49066775314654,"sku":"AHTR-100W","price":29.99,"currency_code":"USD","in_stock":true},{"title":"200W","offer_id":49066775347422,"sku":"AHTR-200W","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/1022\/5630\/files\/Sb8ffd02036b844f98bc4f5762c0168deX.webp?v=1789506682","url":"https:\/\/nautilusandco.com\/products\/adjustable-submersible-aquarium-heater","provider":"NAUTILUS AND CO.","version":"1.0","type":"link"}