Posted: Mon Mar 01, 2010 2:39 pm
Depending on what supplies you have on hand, a sump may work out cheapest. I think usually the most expensive part of a sump is the pump.
But for a 65g the Fluval 405, or the Rena XP3 or XP4 would also be good choices. These are all under $200, and you can often find good deals on eBay.
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