Do I need a powerhead?

[markrob]

I'm running a Rena Filstar XP2 in a 29 gallon fish only tank. Do I need an additional powerhead or is the Rena's output enough? thanks!

 

[Max]

Well, it will push 300 gallons of water per hour in a 29 gallon tank. That will be ok if you just want fish. That having been said even fish would be happy with more flow if you're settin up a reef it would be a must. You'll want 15x to 20x per hour.
hth
Welcome to AC

 

[oscar83]

that should be alright but like max said, try to shoot for closer to 15 or 20 times per hour. also, IME, it is better to have a few powerheads moving smaller amounts of water than it is to have one moving a lot of water. for example in my 75 gallon reef i have 2 mag 7's pushing 700 gph each. i DIYed a pvc system underneath my live rock and sand so now each mag 7 is pushing the water out in 3 different directions instead of 1 if u understand what i mean. HTH