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Bean animal overflow box11/18/2023 The siphon U tube is 1.25" so it can easily keep up with the pump otherwise. However, because the level in the overflow box was not significantly lower than the tank, the flow through the siphon was not very fast which meant my pump could overpower the siphon. I figured this would cause less splashing, which it did. I had my emergency standpipe too high which caused problems. You will also need to tinker with levels a bit initially. If that gets clogged, filled with algae or air, you are going to have a mess. It's reasonably set and forget.Äownsides: you still have a siphon tube as a point of failure. It provides some backup in the event of a clog which has happened, dead fish. The main flow does not have a standpipe in it. One pipe is flooded, the other barely flows anything if at all. I do a similar thing now as a herbie design. I am looking for your invaluable feedback before I put this plan in motion. * The only stand pipe visible in the back, (emergency), would be dry, allowing someone to use clear PVC without having to deal with algae. * No need to have any built-in overflow box and aquascape around it. * As safe as a Bean Animal built-in overflow. * A little more clutter: bulk-head and stand pipe. * Having to drill one hole, instead of none. In my situation I would place the hang the overflow on my less visible side and drill the hole in the back.Äisadvantages (when compared to a pure hang-on approach): Of course the diameter of the hole drilled should match or surpass the other two in the hang-on box, following the BeanAnimal specs. * Plus the drilling of one hole in the tank for the Emergency stand pipe * Hang-on overflow with two stand pipes: Full Siphon + Open Channel In order to mitigate this risk, I am considering the following hybrid design: However, this benefit does come with water damage risk. Its flexibility and external design obviously help achieving a cleaner presentation. Several people here in this forum enjoy their hang-on overflow box. The fact that I do not want to paint the back glass, it makes the second requirement very hard to be achieved. Initially I was trying to design a built-in overflow that is both silent and almost invisible.
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