ok... i set up a 20 high in mid december. its a cheap crappy setup includign two 24" striplights (one powerglo bulb and one marineglo bulb), 100 watt sub heater, and a whisper 30 power filter. its got 60 lbs of live rock and has been doing well. i am toying with the idea of setting up my 20 long and transferring everything and adding live sand (instead of crushed coral im using now). ive got two 30" striplights and a powerglo and marineglo bulb for them. i know itll still be a cheap crappy setup but its what ive got layign around right now. eventually im gonna setup a 220 adn ill do it right with good lighting and a sump and all that but im too broke for now. so to get to my questions... ive got another whisper 30 i was thinking of adding when i transfer eveything to the 20long. would that be too much filtration??? im thinking so but i want more than what ive got (145 gph) and its the only fliter ive got layign around right now. also how important is a protein skimmer??? i know it skims the protwin adn is a method of filtration but im wondering why its important to have less proteins in the water and what organisms it will affect most???? thanx for any info. ive got a book but my friend borrowed it a month ago and i havent got it back yet. i know i need to do a lot more research before i get too into salt. thanx.