It’s generally recommended to use 2.5 to 5 watts per gallon of water. So, for a 30-gallon aquarium, you’ll need a heating device with a wattage of 75 W to 150 W.

What size heater do I need for a 29 gallon aquarium?

Finding the Right Aquarium Heater Size

For the heater wattage, the basic rule of thumb is to use between 2.5 and 5 watts per gallon of actual water volume in the aquarium. However, often more wattage is required, depending on how much you want to raise the temperature.

Can I use a 200 watt heater in a 30 gallon tank?

For a 20 to 30-gallon aquarium, use 50 to 100 watts heater.

A 75 watts is adequate for a 30-gallon in a fairly warm aquarium room, but also useable in a 20-gallon tank in cool to a moderately warm temperature.

What wattage heater do I need for my aquarium?

A good rule of thumb for aquarium heaters is 5 watts per gallon for aquariums 55 gallons or smaller, and 3 watts per gallon for those over 60 gallons. Use a larger size or a second heater if your aquarium is in an especially cold room or is located on an exterior wall or near an outside door.

What size tank is a 50 watt heater for?

The 50 watt option will be a good aquarium heater for a small 5-10 gallon tanks.

How many watts does a 30 gallon planted tank need?

A good basic rule to follow is to provide 1 to 2 watts of lighting per gallon for fish-only aquariums, 2 to 5 watts per gallon for freshwater planted aquariums, and 4 to 8 watts per gallon for reef aquariums.

Can a heater be too big for a fish tank?

No if the heater is meant for a bigger sized tank than used in it will not affect anything in a bad way. As long as the heater is still able to be 100% submerged in water your fine.

Can a heater be too small for a tank?

There’s nothing wrong with a tiny heater. It’s pretty rare for an element to fail, especially if it’s mostly on. If it does fail, you get a colder tank, which is OK.

How many watts is 29 gallons?

Registered. 5 watts per gallon is a decent rule.