grump said:Did you remuber too but a bubble trap in the sump this might be your truble or the return pump might be to large and the water is going back to the tank faster then it drains...just a couple of ideas...I don't have a sump but in the reserch stage of a salt water tank and sump...hope I helped with brain storming and good luck...
HI there if you want movment you can use well placed powerheads in the tank for that...The return pump should match the amount of water that your overflow will drain...Sorry I can't help with the math on that but I know someone will come by and be able too help..fishrule101 said:I think it's the return pump. It's about 1,200 gph! That might be too much. I just wanted there to be more water movement. I thought the return pump had to be fast?
I don't have an overflow. I syphon the water form the main tank to the sump. It's like when you do a water change.grump said:
It's a 28g tank. I don't have a skimmer. I don't use PVC. I used tubing. Should I get a weaker pump? My LFS haves one on sale for about $21. It only does about 160 GPH. I'm thinking that's too weak.au01st said:How big is the tank? You only want the flow through the sump to be 3-5x the display volume as it allows more contact time with the skimmer. I'd put a gate valve or ball valve on the pump output.
This scares me!!! What happens if the siphon breaks? The tank will overflow. What happens if the pump fails? The tank will drain. You should use an overflow box to prevent this from happening, and get this taken care of sooner rather than later.fishrule101 said:
Absollutely and totally agree! Get an overflow box.au01st said:This scares me!!! What happens if the siphon breaks? The tank will overflow. What happens if the pump fails? The tank will drain. You should use an overflow box to prevent this from happening, and get this taken care of sooner rather than later.
It may say 160gph, but that's with a 0ft head. My pump is rated at 950gph in my 75 with a 0ft head, but it's about half that with the height, and it's still dialed back a bit with a gate valve. You want the flow in the tank to come from powerheads, not from the water return. I'd look for a pump in the 300-350gph range. PVC is not necessary, but how is the tubing held in the tank? The benefit of PVC is you can make rigid elbows and stuff and it can support itself.