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Categoria: Caccia e Pesca | Lunedì 27 Dicembre 2021, For aquarium enthusiast, if you want to set up a fish tank, not matter how big is but you really want to set for it. For example, for a 20 gallon fish tank, we should prepare heater, light, water pump, some decoration light or water plant. Before we test the water quality, it is not suggest to put the fish in. All in one, choose a aquarium light is the basic work and what size of heater for a 20 gallon fish tank is enough? Generally, 3.7 to 7 watt heater is enough for per gallon, so a 100 watt aquarium heater is enough for a 20 gallon tank, but when the weather is colder, should we get more watt heater for the tank? So here is some aquarium heaters for your listing.