What PH's for my tank?

[cleverbs]

tank is a 220g standard marinland tank

Right now I have a Gyre 150 and 2 WP-40's I want to get two more power heads and cant decide between 2x RW-20s or 2x RW-15s

What do you guys think?

I want to put them all on the back wall of the tank. See the attatchment for my toughts on how to place the powerheads.

 

[undertai]

Put the gyre on the end of tank, then wp40's on the back wall.

 

[cleverbs]

I dont like the gyre on the end at all. It isnt able to push water across the full 6ft tank.

 

[toothman]

You can not go wrong with the 20's you can always turn the power down. They will be too strong at full power, unless you are bare bottom.

 

[cleverbs]

You can not go wrong with the 20's you can always turn the power down. They will be too strong at full power, unless you are bare bottom.

Oh sorry forgot to include that it is a BB tank