Adding more flow to my tank

[blue2fyre]

I have an 80 gallon bowfront. It's 48" x 18" x 24" and houses mbuna. On the tank I have 2 canister filters with one at each end. One is a eheim 2217 and the other is a eheim 2028. The tank is well filterd but since it is so tall I worry about stuff getting caught in the rocks. When you look at the sand you don't see much poop at all. I worry it's all caught up in the rocks.
Can I get some sort of power head and direct it towards the rocks to blow the poo out? Can I do this without disturbing the sand? What kind would you suggest?

[gt1009]

You could use a koralia powerhead and just direct it wherever you want.

[blue2fyre]

Which one should I get?

[Star_Rider]

depend how much flow you want.
the koralias move water very well

I use 4's in my 110 marine tank and should have bought bigger
but in marine tanks more flow is better.

[blue2fyre]

Well I just want enough to flush out my rocks so the filters can get the crud.

[Star_Rider]

KORALIA 1 400 gph
KORALIA 2 600 gph
KORALIA 3 850 gph
KORALIA 4 1200 gph

this is the flow rates for them

it is pretty close to real flow since there is nothing restricting the flow.

as you can see the 1 is equal(or more) than flow from cannister filters

proper placement helps. they will stir the water well

[Sploke]

I would probably do two K2s. It will take a bit of fiddling but you should be able to get some decent flow through the rocks without disturbing the sand bed.

[blue2fyre]

Thanks for the advice. I'll keep my eyes open for a good deal on a couple.

[FishInMaryland]

Blue2fyre - what did you end up doing? I just bought 3 Koralia Nanos (240 gph for $14.99 from Drs F&S - ends tomorrow), and have put 1 so far into my 55g for just the reason you described, although I have gravel and not sand. I'm tired of taking apart the rockwork and rebuilding it every week.

[blue2fyre]

I haven't gotten anything yet.

I've been looking for some used equipment in my area first.

[Chrisk-K]

You could use a koralia powerhead and just direct it wherever you want.

+1. In my 40g, I run two Eheim 2236's and a Coralia 2. The Coralia is dead silent and creates nice current.

[blue2fyre]

Oh thanks for mentioning the silent thing!

I forgot to mention that ANYTHING to do with this tank needs to be very quiet.