I am a poor college student and my father and i tried to develop our own protein skimmer and spent about 130 bucks on pvc and proto types. But unfortinality it works some days but other days it doesnt. what type of hang on skimmers work efectively on a 90 gallon aquarium for the best price. I am familiar with prizm skimmer and the back packs but i know the backpacks are to small. Any ideas because i dont have a sump to place a skimmer off of or in.



