internal or external

[Dandre]

I have a 20 gallon tank, should I get a whisper internal filter or external filter also how do internal filters work

 

[littletankbigworld]

It is really a matter of preference. I prefer external filters because they take up less water space. I'm not an expert, but I believe internals are quietier, and sometimes create less of a current than external filters. I'm not an expert, but that's what I hear. They both require filter media and I'm sure internal ones are not that hard to work.

 

[Doomhed]

the internal on my betta tank is completely silent but doesnt move the water as much even though it is a supposed "10 gallon" pump on a 5 gallon tank.

the external "Hang on back" or HOB filter on my 25 is silent when the water level is high enough. every now ans again it gets a small air bubble and makes a little noise, but not much.

if you are talking about an external canister, those are generally silent as well.

 

[Newman]

depends on how much flow you want and if you want to sacrifice display tank room.