Sump problem
- Thread starter FRANK48
- Start date
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blaxsun
10K Club member
So your main display tank is roughly 50 gallons. I’m not sure how to disable the ATO on this sump, but what I would probably do is either disable it or empty the ATO until you get the flow balance worked out.
And yes, I agree with the others. Once you disable the ATO try slowing the pump down. With a gate valve this is a lot easier, and you can also tune it to eliminate any “gurgling” sound.
I've used HOB overflows and they can develop air bubbles in them that slows the flow. They can be a pain to keep flowing correctly. What type of overflow? I used CPR that have built in bleeders to clear air bubbles. You said you have a new sump, is the return pump the same as you where using before, or did you just add the overflow , sump and pump?
workhz
Valuable Member
It sounds like you have it going full blast if the only thing you can do is reduce it. Also looks like 2000l but not seeing how much that drops at what height.
Just dial it back a little. Should still get you decent turn over.
Just dial it back a little. Should still get you decent turn over.
blaxsun
10K Club member
Based on the specs for your pump, it’s rated at 2000 lph. You’ll want somewhere between 1000-2000 lph turnover (5-10x) for your display tank, but this is just a range and subject to a lot of variables. You’ll also lose some flow for vertical height, 90 degree elbows, etc.
Without a gate valve (or other way to adjust your overflow), you’re pretty much limited to adjusting the speed of your pump. And if it’s at 100% then I would try slowly dialing the speed back bit by bit, ie: adjust it down one level - and watch the water level in your sump.
Without a gate valve (or other way to adjust your overflow), you’re pretty much limited to adjusting the speed of your pump. And if it’s at 100% then I would try slowly dialing the speed back bit by bit, ie: adjust it down one level - and watch the water level in your sump.
OP
OP
FRANK48
Active Member
Thank you I’ll try all your suggestions
blaxsun
10K Club member
Nope, not unless you’re boiling the water in the sump. Evaporation will happen, but it’s not instantaneous - and it’s not really something you can observe in realtime. I would disable the ATO, get the flow balanced and then increase your water levels to where you’d like them in both the display and the sump. Balance out your salinity and then re-enable the ATO.
Sebastiancrab
2500 Club Member
If nothing works, add a gate valve in the line coming into your sump.
Wait and see how dialing down the pump works. The aqua lifter would just be to keep overflow primed and air out right? Can you see any air in the overflow? Not familiar with tunze overflows.
Also does the display water level rise or just the sump level go down? If water level in display rises, you are pumping more water into the display then the overflow can handle. What is the rated flow rate of the overflow? It should be higher then the flow rate of your pump.
