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  1. I'm hoping for help on two semi-related issues. First, the plumbing. I have two tanks with CPR overflows (a 55 FOWLR with a CS50 and my 75 DT with a CS100/102). I want to re-do the plumbing and connect to the threaded exterior of the bulkhead on each of these boxes; however, I can't seem to find anywhere that gives the size the bulkhead in terms of what I need. In other words, I'm looking for what size female coupler / adapter I need to connect the threaded bulkhead with the piping going downstream. It could be threaded / slip or threaded / threaded. I also know the CS50 inner diameter is 1/4" less than the on the other CPR boxes, but I'm not certain if that's true for the exterior threads. I don't want to disassemble the plumbing until I'm ready to proceed to completion, and can't figure out another way to determine the sizes I'm looking for. Does anyone out there know? I wish I could just drill the tanks, but they're tempered so that's not an option. Second, the fuge. Recently I've noticed my chaeto isn't growing like it used to, although the GHA in the tank itself I need to knock back periodically tells me the nutrients are there. It seem that some of it develops bubbles (probably oxygen, which ought to be a good thing), floats to the surface, and then shades the rest of the growing area. What lighting cycles are folks using (x hours/day, concurrent or counter-cycle to main lighting)? Also, does anyone run additional circulation / flow in their 'fuge beyond the regular through flow? I've seen the "swirling ball of chaeto" videos, and while it's certainly attractive at one level I suspect the 'pods would be less thrilled. So, I'm wide open to the collective wisdom of WAMAS. Thanks in advance!
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