Greg! How's that link coming along? I think I'll be getting the tank probably in the next week or two. I figure I'll crack it one way or another.

Here's my thoughts. I'm going to run a fairly low GPH return pump. Probably something in the neighborhood of 400GPH. A QO2200 pump will be around 400 at 4' of head, so that may be perfect. I'll probably split that into two 3/4" lines to the tank with some lockline. Then I'm also thinking about running a closed loop on the tank with two 3/4" outlets with a SCWD from a QO4000. That should net me about 700GPH or so, maybe more depending on where I put the pump. I should be close to 30X turnover per hour with that setup. Worst case I put a cheap SEIO 620 or two for more flow without breaking the bank. That puts me at four holes for 3/4" bulkheads and two holes for 1" bulkheads in the back of the tank. Lots of drilling! That's why I'd like to get a line on those diamond hole saws.

As far as my refuge goes, here's what I'm thinking....

Tank drains into a 20L "sump" that contains my ASM 3G skimmer with gate-valve mod. That tank will be raised about 4" to 6" above the floor of the stand. I'll bulkhead that on one end (hey, if I can get 5 holes in a 40B, why not one more in a 20L) and that will drain into another 20" that will act as a refuge before returning to the tank. I'll only be running around 400GPH through there, so I don't think that microbubbles will be an issue.

Thoughts? Questions? Comments? Insults? Cookie recipes?

Eric