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Which ones do you recommed for a 15-20 gallon tank2007-11-24 23:43:02

The rule of thumb for heaters is 3-5 watts per gallon. So, a ten gallon tank would have about a 25-50 Watt heater and a 20 gallon tank a 75-100 Watt. Any decent brand is fine but stay away from really cheap heaters. I have had bad experiences where cheap heaters' thermostats got "stuck" and could have overheated the tank. Get a good brand of heater. Ebo Jager is one I like but there are many others.

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My tanks are sort of cobbled together from about three different setups, but I can definitely tell you this: You will want an air pump. The fish can live without it, but it'll make them much more active to have the oxygen in the water. Shouldn't need a powerhead, I wouldn't think. I use a small heater--not sure of the brand, it was given to me--that just plugs in and stick it in the water. (Keep it away from any plastic plants, though!)

Sounds like a good setup--just don't forget to cycle, and good luck!

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I would say go as big as you can. down the line you may want to put other things into the tank and the bigger the tank the more room you will have. I have been keeping fish both fresh and salt water for over thirty years. I think You will be better off

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my wife has 11 fish tanks none smaller than 50.over the side filter will work fine,nothing else needed.However you are overstocking yours.You don't need a powerhead and an air pump is a good way to get your fish sick.Ocassionally you'll wanta add a little "doc wellfish" aquarium salt(yes even for fresh water,it keeps your fish healthy and helps them grow.for the number of fish you're talking about you'd be better off with a 50.

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You sound like you are prepared. Get the larger tank, you will be happy you did. Your choice of filters are good, just add an undergravel filter with a powerhead. I use the Tetra Whisper Series myself. The waterfall effect is good because you can hear it when it is quiet. Get an air pump and a small airstone if you like. A heater and filter rated for the next larger size tank is best. Get a light bulb that enhances the fish and live plants if you get them.