Converting a durso to Bean Animal

[asylumdown]

Just wondering if this is possible or if anyone has done it? I'm trying to figure out if a modified version is possible, as I would be converting my standard internal overflow boxes (the holes are on the bottom of the tank). My sump design is notorious for allowing microbubbles back in to the display, which forces me to run filter socks to catch them, and so far I haven't found a filter sock that a) catches all the bubbles while b) doesn't start overflowing after 24 hours. I hate changing filter socks every single day.

I've got two internal overflow boxes, one on either end of the tank. Each box has two holes in it, so I've technically got enough holes for a bean-animal. I obviously don't have a coast to coast, but by my reckoning I could make it work by having one shorter standpipe that was throttled until it was a slightly overdriven full siphon, a second slightly taller standpipe that took up the tiny amount of excess that the throttled full siphon couldn't handle, and a third, even taller standpipe that functions as an emergency drain.

My main question would be if this would be a good idea, and where I should put the drains relative to each other. If I put both the siphon drain and the trickle drain in the same overflow box, the other overflow box would become a deadzone, and I'd lose 50% of the surface skimming capacity of my tank, but if I put the full siphon and the trickle drain on opposite ends of the tank, I'm not sure what effect forcing the water from one drain to travel the entire length of my tank to get to the skimmer chamber would have on the system. Will it cause noise if the trickle drain has a 90 degree bend in it?

Also, I need to be able to temporarily divert the flow of both drains to another sump chamber using a gate valve. I presently have all 2 inch plumbing, which takes up a ton of above sump cabinet space so both my overflows are plumbed together in to a single outlet pipe in to the sump, with a single gate valve that I use when I need to temporarily divert flow. I wouldn't be able to do this with a bean-animal, so would I be able to reduce my pipe diameter to accommodate two completely separate runs of pipe? My return pump pushes between 3000-3300gph.