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I am taking over the duties of the 55gal tank at my job, it is fresh water now and I am going to change over to a Mbuna tank maybe some peacocks. The tank has a wet/dry filter, I have never used one...does anyone know if these are sufficient enough for african cichlids? and does anyone know what rate per hour they cycle? I know nothing about them, please help
 

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Generaly speaking a sump/wet-dry system doesn't have to turn over as much as say a cannister or power filter. 5 times the tank volume is usually considered fine as long as you have enough bio-media.

Ideally you would want to have the return from the sump positioned in such a way as to keep the substrate clean. Not always that easy. I would add a powerhead or two to help keep the detritus circulating. Especially in a crowded tank.
 

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does anyone know if these are sufficient enough for african cichlids?
More than sufficient. It's a very good filter for African cichlids. You may just have to be diligent about vacuuming any detritus from the surface of the sand when you do your water changes. Going with iceblue's suggestions may help keep it off the substrate. I find I have just a couple of areas in my 180 where it tends to collect which makes it easy to find and remove.

Here's a good link with some info on sumps.

Here's another.
 
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