I prefer the AquaC Urchin. Its not that the Tunze returns water with low oxygen. Its just that it is a closed loop skimmer and the water exchange is done through 2 small holes. So instead of getting 200 gallons per hour going through the skimmer, you're getting about 1 or 2 gallons per day probably. If you don't overstock, then its probably good enough.
Last edited by Samw; 11-12-2006 at 08:12 PM.
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