which powerhead is good enough to 30G?

[lastduke]

will setup a soft coral tank, 30G display tank with 20G sump, using eheim 1250 as return pump, what powerhead will be good enough for my tank circulation flow?

[gastone]

I use one maxijet 900 with a sureflo mod on my 30g frag tank. Lots of flow but I'm thinking about adding another one.

[pjf]

See if your return pump alone can provide adequate circulation flow. Then determine if you need additional flow. If the return pump can provide a circular (gyre) flow with live rock in the center, my guess is that the flow will be adequate.

The guideline is a 10 x volume (10 x 30 = 300 gph) for circulation.

I personally like using the Maxi-Jet model 400 to 1200 powerheads because they can be back-mounted or side-mounted without clumsy swivels to the glass using a Sure Grip 50 magnet.

[RumLad]

For $35'ish you can put a Koralia 1 in there that will give a nice wide flow pattern. They are easy to mount, easy to aim. Coupled with your return flow, you should be good to go.

[lastduke]

Thanks, the return pump was 317gph, regarding to the retrun line, there are the three 90 degree elbows, but the Eheim 1250 has a really good reputation on head pressure loss. so I assume my return flow are close to 300 gph.
But How do I know there is a circular flow or not?

and, gastone what is the sureflo mod, could you please give me link or a picture?

[mg426]

A couple Koralia 1s should do the trick.

[MattG]

i would add a tunze nanostream 6025 or a 6055 if you dont mind spending the dough.

I have a 30 cube with an eheim 1250 return pump and the eheim is just the right size.