Alright. So my first build using a reef ready tank is underway (sort of) and I have come to my first speedbump. I purchased a 72x18x30 tank with a corner overflow. I have no idea how to plumb this overflow so I would like some help/need some advice. Like I said it is a corner overflow, and it has 3 holes on the bottom. The one in the middle is a 1 3/4" bulkhead and the two on either side are 1" I believe. I'm assuming that the large one is for my drain and the other two are for returns, or can i use the big one and one of the little ones as drains to help it to keep up with the Rio HF20 pump that I am going to be using and just use the remaining for the return? My next point of confusion is that it has 2 screens about half way up connected to some flexible tubing that is coming up right now. I can't figure out if these are meant to be the returns or if they are supposed to drains as well? My gut says that it would be a bad idea to have them as drains since if the power went out it would drain the tank down to half volume. Hopefully these pictures are good enough to give you the basic idea.
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