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Discussion Starter · #1 ·
Ok, so I’ve asked several questions in the past 2 or 3 days, but this should be one on the last. I just purchased a 90 gallon tank, an upgrade from a 20high. I will be using 2 AC110 filters on the new tank and I’d like to give one of them a head start in the biological area. If I were to set up a AC110 on a 20 gallon tank would it cause too much turbulence in the water? I know some fish like the water flow, and some don’t. Would Lake Malawi Cichlids be able to handle the water flow for a few weeks or should I keep the small Wisper30 filter running ‘till I’m ready to do the final setup?
 

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It depends, I **believe** there is a switch/dial or something in which you can tune your flow, or turn it down a little bit, you could try that, if there is one... :-?

But, 500gph on a 20 high would be a little bitty good flow, you'd have good water movement, and oxygenation.I'm not sure if the malawis would like it though.They probably wouldn't mind it.
I'll let someone else(maybe with experience) chime in to help.
But, some Malawis and fish enjoy a heavy flow.
 

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Discussion Starter · #3 ·
Yes it does have a control, i'd turn it all the way down i guess it would still flow 166 gallons/hr
 

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I've run an AC 110 on a 29 gal and everything was fine... I run similar gph ratios on most of my tanks and have no problems...

So be it your 20 gal is only 2/3 the volume of my experience (29 gal)... but I still wouldn't expect this to be enough to be problematic, especially as a short term situation...

Chances are you'll want to add a couple powerheads to the 90 gal. When I run 3 AC 110's on my 90 gal most of the waste makes it into the filters, but with 2 AC 110's most of it stays on the substrate...
 

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I've ran a 110 on a 20 High to clear it up some with no problem. Now for the real kicker, I've also ran one on a 10 gal with a couple jewels in it. :lol: Ok so it was a little over filtered. It was the only spare filter I had lying around. What I did to slow ( and or break up) the flow was put lots of larger rocks in the bottom, put a sponge prefilter on it, and turn the slider thingy to the lower position. The jewels loved it actually. Though it was temporary.

In the 20 gal, I didn't feel it needed anything to slow the flow. I say go for it. Just hang it off the front until the new tank is set up.
 

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Hehe, I ran an AC70 (AC300 in the old parlance) on a 10 gallon with my multi's once while I was moving... The waterfall was on one side of the tank, and the multies stayed on the other!
If you turn down the AC110 to the minimum flow there should be no problem at all in a 20 i'd think.

-Rick (the armchair aquarist)
 
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