Bean animal in a center overflow3/12/2024 The second if for a small amount of additional flow beyond what the total suction can take. One is for total suction and has a valve down in the sump for control. I then drilled 6 bulkheads, 3 on each side. The top edge is about 1/4 inch below where i want the water level. As a brief description, i built a 4x4 glad box inside the back of the tank that extends the length of the tank. They have beed very easy to build and i am very happy with how quiet the tank is. In both i have used glass with good results. So if it helps you, i have made two coast to coast / bean animal overflows for 6 ft tanks. I've also seen threads where people have built acrylic boxes and then sealed them using a gasket between the bulkhead and the inside of the box and then another bulkhead between the outside of the box and the glass of tank itself, if that is necessary I can do that too but I may need different bulkheads than the ones I've already ordered. My question is whether I should stack the drains one on top of the other on one side of the tank and use a vertical box OR if I should drill the holes horizontally beside each other along one pane of glass and use a horizontal box.įollowing the community input, the next big question is glass or acrylic for the overflow? I know acrylic doesn't bond well to glass, but I have seen threads online about people having some degree of success in the past with acrylic bonded to glass as their internal overflow box but I'd rather do it right and not have to worry about it. I'm going to be setting up a Herbie overflow on a 6 foot freshwater tank and I'll be drilling the tank myself. This overflow box isn't going on a reef tank (unfortunately) but I am stealing an idea from the reefing community.
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