I have an eshopps overflow cup that I've used on my SW
tank for a while. Over this time I've performed several modifications to it, and sort of broke it. It's been doing its job for a while but recently it hasn't been working very well. Here are a few pictures:
Basically, I had a fish a while back that hid behind the overflow cup and wouldn't come out, even to eat. I glued some eggcrate to the back and that solved the problem until one day I tried to put it back on, and bent it a bit too much until the acrylic broke. That's why it's taped together.
Here's the problem: that joint needs to be rigid. Usually, (whenever the pump is running) the level in the overflow is lower than the rest of the tank, causing upward force, and that makes it swing out (like in that picture). I put some metal "U" things to try and hold it in place, and it worked for a while, but it's not doing the job anymore and I'm not sure why.
Anyways, I'm looking for some kind of device to hold that part of the overflow in place. I can't just lock permanently it in that position because I want to be able to get the overflow on and off. It would be better if it wasn't metal like the thing I have now. I'm not really sure what the right approach to take here is. Any suggestions?