This may sound like a stupid question but, I'm looking at a 400 gallon aquarium, it's got a built in glass overflow. What exactly is an overflow? Is it a filtration system? If so would my FX5 canister filter be necessary in the tank?
The tank measures 96"x38.5"x25". I'll be going today after work to take a look at it. We will be putting it in our basement, my boyfriend was kind enough to work on moving his 'man room' or whatever he calls it to make room for the aquarium. I was originally looking for a 250 or 300 gallon but I saw this one and I thought I'd take a look at it.
That's an amazing tank. I look forward to seeing it develop - hope you'll keep us up to date!
An overflow is easy to understand. Some people use large filtration systems that draw lots of water from a tank through a connection called a bulkhead. An overflow is a good way to bring that water to their filter and skim the tank surface at the same time. The overflow will be a small compartment probably located in a back corner of the tank. It will have a top section that looks much like a coarse comb where surface water can run through to that isolated section. They set up the filter to draw water from that overflow section and return it to the main part of the tank. Overflows are used more often with saltwater tanks but there is no reason not to use one in a freshwater tank.