Removal of organic waste. If you let it sit in there, over time as it breaks down it becomes an acid ..effectivly dropping your PH until it crashes.
There are vacuums made to run off of a battery or an airline that removes waste without pulling the water. But seriously if you really wanna go to that much trouble you might as well do a water change. I find the vacuum only good to be used as a tool for waste removal between water changes. It's great for cleaning bare bottomed tanks.
Last edited by Pure; 09-16-2008 at 02:59 PM..
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