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hey sry for the big font but i kinda need an answer asap. heres the deal. i have a 29 gallon mixed juvinile malawi cichlid tank. basically I use it to grow out my cichlids once they are around 1 inch. my question is, is it possible to have to much flow. currently i just added a koralia 3 in the tank and most of the cichlids seem to be sitting towards the bottom instead of freely swimming. will they eventually get used to this ammount of flow?
 

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You may have too much flow. Are you using other filtration also (HOB , Canister)? If so, I think a canister or HOB plus a Koralia 3 may be too much flow for a tank that is only about 30" long. Now that I think about, your fish are just too small for that much flow.
 

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Yes you can have too much flow... I have no clue if you do or not...

I once ran an AC110 and a Magnum 250 on a 29 gal tank... The AC is all I had available at the time... and it worked well... some time later I wanted to add a UV light and did so powered by the Mag HOT (250 gph - rated). There sure wasn’t any waste on the bottom but the fish (young Dempseys) were fine…

Wow I just looked up your powerhead and it's rated for 850 gph... and powerheads function closer to their rating (less restriction) than filters... that's a lot of current... :p

But your the one looking at the tank... does it look like too much current?

I use pretty strong current in most of my fry tanks. They seem to spend a lot of time (apparently) playing in the currents even though there are plenty of other areas with less flow. If they have to work constantly just to stay in one place... it's too much... but as long as they can get food and relax in the slower areas I would think they are fine...

But again, your the one looking at the tank so your guess is much better than ours...
 

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In my opinion, that is way too much flow. I have a Koralia 2 in a 20 long (same footprint as standard 29) and it is too much flow for that tank. I imagine your Koralia 3 in a 29 gallon looks similiar to a typhoon.
 

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8) Too much flow. Lose the K3. "T"
 
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