I agree that the Prism sucks. Against everyone's advice, I went out and bought a brand new one for my brother's tank. It sucks. If we reduce the water flow, air gets trapped and accumulates in the water intake until it breaks the siphon and the filter completely stops working (in about 2 days). If we increase the water flow, the collector cup overflows in less than a day. I read a suggestion on RC that a good solution is to somehow raise the skimmer up higher by putting something underneath it and then I can increase the waterflow and prevent the air collection in the intake tube. If the skimmer was built properly in the first place, I wouldn't have to use this hack.
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