How many powerheads for a 20G tank?

[nicuz]

How many powerheads for a 20G nano reef and how should they be positioned?

[SK8URDEAD]

How many powerheads for a 20G nano reef and how should they be positioned?

 

2 koralias/tunze or 1 vortech

 

main goal is just try to make sure there is flow around the bottom sand bed to keep detris from collecting.

[elite401]

It depends on what you are keeping...as is the case with most reef equipment purchases. If you are only keeping softies and LPS I would recommend 2 koralia 1's. If you plan on adding some SPS I would think 2 koralia 2's or even 3's would be needed. Of course a vortec would be great but most people aren't going to spend that much money on a power head unless they are going with a lot of SPS and even then there are cheaper options.

 

As for positioning, many people like to have two or more power heads directed towards each other to create a semi-random flow pattern.

[nicuz]

2 koralia it is. Thanks for your suggestions.

[davenia7]

I say as many as you can get in there without blowing the fish and rocks out of the tank.

[Haagenize]

select a powerful enough powerhead that will blow through the whole 30" of the 20L or the 24" of the 20H

[PBUEHH]

I'm with the school of massive flow. I have a 'fuge ac 110, an empty whisper 20 (that i might as well toss out) and two aquatic garden ph's that should be doing 60gph each.

 

since all the media is out of the AC110, I don't actually know how much flow I'm really doing. point being the more flow from the more directions is better.