{"product_id":"fluval-pre-set-aquarium-heater","title":"Fluval Pre-Set Aquarium Heater","description":"\u003cp\u003e\u003cstrong\u003eSet it, submerge it, forget it — a heater with nothing to misadjust.\u003c\/strong\u003e The Fluval Pre-Set Aquarium Heater holds a fixed 24–26°C automatically, with no dial to bump out of range. It's built for small, straightforward setups — nano tanks, quarantine tubs and betta bowls — where a full adjustable heater is more control than the tank needs. It's sold in two wattages: 10 W for tanks up to 10 L, and 25 W for tanks up to 25 L.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed 24–26°C output\u003c\/strong\u003e — no dial means no risk of an accidental temperature change.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShatterproof polymer body\u003c\/strong\u003e — safer around active fish and inquisitive hands than glass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully submersible\u003c\/strong\u003e — the whole unit, cord included, can sit underwater.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED running indicator\u003c\/strong\u003e — a light confirms the heater is drawing power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo wattages\u003c\/strong\u003e — 10 W for up to 10 L, 25 W for up to 25 L, so you can match it to the tank rather than oversize it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003e10 W (SKU BA9128)\u003c\/th\u003e\n\u003cth\u003e25 W (SKU BA8710)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePreset temperature\u003c\/td\u003e\n\u003ctd\u003e24–26°C\u003c\/td\u003e\n\u003ctd\u003e24–26°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated tank volume\u003c\/td\u003e\n\u003ctd\u003eUp to 10 L\u003c\/td\u003e\n\u003ctd\u003eUp to 25 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e13.5 x 2 x 1.5 cm\u003c\/td\u003e\n\u003ctd\u003e15 x 3 x 1.75 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eShatterproof polymer, fully submersible\u003c\/td\u003e\n\u003ctd\u003eShatterproof polymer, fully submersible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermostat\u003c\/td\u003e\n\u003ctd\u003ePre-set, non-adjustable\u003c\/td\u003e\n\u003ctd\u003ePre-set, non-adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarcode\u003c\/td\u003e\n\u003ctd\u003e015561107433\u003c\/td\u003e\n\u003ctd\u003e015561107440\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhich wattage do I need?\u003c\/h3\u003e\n\u003cp\u003eMatch the heater to your actual tank volume, not the tank you plan to grow into. The 10 W is rated for tanks up to 10 L; the 25 W for tanks up to 25 L. Fluval notes that in a cold room — below about 17°C ambient — even a correctly-sized heater may struggle to hold 24–26°C, and a higher-wattage model is the safer choice.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for small freshwater and marine tanks, nano setups, betta bowls and quarantine tubs at the rated volume.\u003c\/li\u003e\n\u003cli\u003eNot suitable if you need a specific target temperature outside 24–26°C — this heater has no dial, so species needing warmer or cooler water need an adjustable heater instead.\u003c\/li\u003e\n\u003cli\u003eNot suitable for tanks larger than the rated volume — undersizing a heater means it can run continuously without reaching temperature.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eFully submerge the heater before switching it on, and always unplug it before removing it from the water — running a heater dry can crack the casing. Because the temperature isn't adjustable, there's no dial to set incorrectly, but there's also no way to fine-tune it for a fussier species. A heater guard is recommended in tanks with fish or invertebrates prone to resting against warm surfaces.\u003c\/p\u003e\n\u003ch3\u003eRunning costs\u003c\/h3\u003e\n\u003cp\u003eA heater draws its full wattage only while actively heating — the thermostat cycles it on and off once the tank reaches 24–26°C, so actual running cost is well below the wattage times 24 hours. The exact duty cycle depends on your room temperature and tank insulation, so we haven't published a specific annual figure here.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by Fluval's manufacturer warranty against defects, in addition to your rights under the Australian Consumer Law. Standard parcel delivery.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhat temperature does this heater run at?\u003c\/h4\u003e\n\u003cp\u003eA fixed 24–26°C, with no adjustment available on either wattage.\u003c\/p\u003e\n\u003ch4\u003eCan I use the 10 W version in a 20 L tank?\u003c\/h4\u003e\n\u003cp\u003eNo — it's rated to 10 L. Oversizing the tank against the heater means it may never reach the target temperature, especially in a cool room. Use the 25 W version instead.\u003c\/p\u003e\n\u003ch4\u003eDoes it come with a heater guard?\u003c\/h4\u003e\n\u003cp\u003eNo guard is included. If you keep fish or invertebrates that rest against surfaces, fit a separate guard.\u003c\/p\u003e\n\u003ch4\u003eIs it safe for marine tanks?\u003c\/h4\u003e\n\u003cp\u003eYes, both wattages are rated for freshwater and marine use.\u003c\/p\u003e","brand":"Fluval","offers":[{"title":"10 w","offer_id":55249638097187,"sku":"BA9128","price":39.95,"currency_code":"AUD","in_stock":true},{"title":"25 w","offer_id":55249638129955,"sku":"BA8710","price":43.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/MRN26_5_cdd85278-35e5-4458-869b-ca81c31ebb73.jpg?v=1786076546","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/fluval-pre-set-aquarium-heater","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}