Your pump is pretty shallow. My only thought is that you are getting a vortex every few moments. Can you place a sheet of plexiglass or glass horizontally above the pump to divert the water more broadly?
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How is it shallow? At least 3-4 inches above the pump?Your pump is pretty shallow. My only thought is that you are getting a vortex every few moments. Can you place a sheet of plexiglass or glass horizontally above the pump to divert the water more broadly?
Vortex can go that deep.How is it shallow? At least 3-4 inches above the pump?
I read thru the rest of the thread, and it reminded me that you can also try something else, and maybe, keep the water level at the same height as you normally kept it at. I installed a thick filter, that was originally meant to be used to filter debris before hitting the return pumps, between the 2nd and 3rd chamber to help settle any bubbles. Is their anyway of adding such a filter. I would, maybe, try to lay a filter across the top of the section that allows the water to flow from one chamber to the return pump chamber, and see if that settles out any microbubbles.Well I tried what @Billldg did and upped my water level in the sump. Stopped the waterfall completely and low and behold, haven't seen any bubbles yet for at least a couple of hours. What sucks is, my gravity fed ATO that Cade designed for this is now utterly useless. I'm going to have to put my old Tunze ATO on here and find an ATO container. Cause Cades is built into the back of the tank.
I actually have been doing that for the past month in an effort to stop the macro algae I had in there from going into the return pump. Still had bubbles. But I’ve since removed it cause now I only have Chaeto in there and it doesn’t move.I read thru the rest of the thread, and it reminded me that you can also try something else, and maybe, keep the water level at the same height as you normally kept it at. I installed a thick filter, that was originally meant to be used to filter debris before hitting the return pumps, between the 2nd and 3rd chamber to help settle any bubbles. Is their anyway of adding such a filter. I would, maybe, try to lay a filter across the top of the section that allows the water to flow from one chamber to the return pump chamber, and see if that settles out any microbubbles.
Just did some research and it appears this is not a DC controllable pump. All you can do to turn it down is turn a knob on the pump housing to block off some of the input. This increases the negative pressure in the impeller chamber and promotes increased cavitation (makes more bubbles). You simply have way more pump than you really need for your tank. I'd recommend replacing with a much smaller (maybe 1/3 - 1/2 the flow rate) pump and you should see the bubbles go away.Well this is something I've never understood. I know you are supposed to have at least 10x turnover right? So its a 57g display, with a 13g sump. So 70g total. Not counting displacement from rock/sand in both fuge and DT. The Sicce 5.0 Silent is rated at 1321GPH. I also have a Nero 3 running between 50-75% which is over 1300 GPH. But I also have a ball value on my drain line choking it down to keep it quieter plus avoiding bubbles. So to be completely freaking honest @Billldg I have NO idea lol. I say I have good turnover, but honestly with all the displacement, plus the ball value choking it down, I couldn't tell you. I've never understood how people figure that out. Guess I'd need a flow meter?