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Tank

Found 1 result

  1. Greetings all, new member here and I need some help with a noisy overflow. Confessions up front: I didn't do enough research, trusted my LFS too much, and ended up with a beautiful undrilled 150 gallon tank and a stand with no side opening. Needless to say, setting up any sump was a bit of a task, but I managed with a small Trigger 26 fed from an eshopps PF-1200 HOB overflow. I have the overflow plumbed to the sump via 1" flex PVC, with one side going to the built-in sump drain and the other going to a Sock-It in what was supposed to be the skimmer section of the sump but is now just for the return and maybe for a small refugium in the future. The issue from the start has been noise. Doing some research I put together a pair of Stockman standpipes which individually work quite well. The problem is that with two of them sharing the overflow, it's almost impossible to get them to drain evenly and when they do not I get the flushing/surging effect complete with loud belches of bubbles into the sump and a nasty sucking sound from the overflow when the overflow's water line drops below the entry of one or the other. Not great for the living room where the tank is set up. Through trial and error and a great deal of luck I've managed to get everything mostly stable and now it just sounds like your standing at the beach (most of the time). I can live with that. However, it is incredibly finicky; it will go for a couple of days and then flush and slurp again. The water level in the sump will be steady and then it'll change when the overflow changes and drive my skimmer and ATO crazy. I can play with it and get it to behave again, but I as it is I can't leave it alone and I just don't want to have to keep fiddling with it. My wife recently asked why not a full siphon from the overflow tubes. I think the answer is that if the return pump stops, the overflow will drain until it breaks suction and then won't restart when the return pump comes back on, is that correct? Otherwise obviously it would be the "perfect" solution for a quiet system. Another option would be a return with a single, large pipe rather than two smaller ones, but I don't see any that are that big. My return is 1.25" diameter, so 2x1" is overkill, but 1" is smaller than I think I should go. Could I drill out a larger hole in a single drain overflow? Would that make sense? Again, I don't know enough to answer the question. I'd like to not have to throttle back the return pump too much (it's a Varios 6 set at about half speed right now) just for water flow and oxygenation. So, what do you all recommend? I know that if I could go back in time I'd have bought a drilled tank for one, but that's not a practical option at this point. What can I do with a HOB overflow for a 150 gallon tank that will be reasonably quiet? Thanks. John
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