70 Gallon Freshwater cichlid tank.  This aquarium is set-up using a canister filter and a E125 .ECO-Aqualizer.  This aquarium has not received a water change in 8 months nor has the gravel been vaccummed.  The ammonia remains under .05 and pH remains very stable at 7.86 

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    Water clarity is excellent.   No yellowing water.   Gravel substrate remains clean - no detritus build-up.

           6 inch Peacock Cichlid-excellent coloration               5 inch Frontosa - excellent color separation