Posted: Sun Sep 20, 2009 11:52 pm
Well the general rule of thumb for RES's is to have a filter that is designed to filter a least 2 times the size of your tank, because they are very messy with their food and using the restroom ect.
So if you have a 50 gallon tank, I would recommend using a filter designed for filtering a 100 gallon tank.
If you only actually fill it with 35-40 gallons, then at minimum you should have a filter designed to filter an 80 gallon.
Remember, you can never have enough filtering lol.
But obviously, like all of us, pricing is always an issue.