Penguin Bio Wheels ..
- Thread starter Davey
- Start date
Yes, that would be fine, I have 1 penguin 125 on my 10g tank, so doubling that, I think it would be fine.
I have a Penguin 170 on my 20 gal long with an undergavel attached to a powerhead, does well for me. The dual 125's would be even better.
One 125 is probably enough for a 20. That is all I had on mine. I have two 125's on my 44, and they seem fine.
It really depends on how you stock your tank. If you have a lightly or moderatly stocked tank, a single 125 should be OK (although I'd probably go for a 170). If you plan to stock heavily, a couple 125s would probably be better.
Jim
Jim
I have a 110 on my 20 gallon. It does the job although I am upgrading here shortly to something bigger. Maybe a 125 since they use the same filters. you should be ok with a 125 but a 170 is always better. 
I run a penguin 330 on my 35gal...absolutely no complaints!
I'm not sure but they do have the same filter cartridges. I don't think they make the 110 anymore because the 125 made it pretty much obsolete. I just bought a Tetratec PF300. My boy at my LFS said it was awesome. I can't wait to install it and see if it is better. If it is I will probably put the 110 on a 10G QT.