several questions about overflow tanks

[WHiteout]

1. how do they work?
2. are they easy to maintain?
3. where can i get one or how do i build one???



thanks guys!

[Aquarist007]

This might help:
http://www.reefcentral.com/wp/?p=299

[weaselslucks]

I have a life reef overflow works like a charm. Just place it on the back of the tank and hook your pipeing into it. go to melvesreef.com he has amoveing image of one working i believe.they are really simple to take care of

[NeveSSL]

Personally I use overflows from Glass-Holes.com. Great stuff!

Brandon