Water level in overflow all of the sudden raising

[Ccasasolac]

I been having this problem, I have a Aquaforest oceanguard 605 running for about 2 yrs now. All of the sudden my display water and overflow water level raising making my ATO compensate for the low water level in my sump. I cleaned the return pump and adjusted the salinity for 1 week and today again the water level went up. Any suggestions of what can I do? I already played with the valve yo raise level in the sump. Thanks for any help

 

[workhz]

Any chance of a picture of tank, overflow, sump and piping?

 

[Ccasasolac]

Any chance of a picture of tank, overflow, sump and piping?

Could it be the return pump, ATO. I don't think it's a blockage because when I adjust the flow valve it does change the level in the sump. It was running fine for almost 3 years. I just running out of ideas.

 

[don.chaneaux]

Please check this thread. Removing the silencer and have water trickle into the emergency might cure it.

Aquaforest oceanguard display tank water level problems

I am ready to pull my hair out. I got a new oceanguard 275 about 7 months ago. I have never been able to keep water level correct. No matter what, I get it stable, then within a day or 5 at best, ato goes off too much and display is too high and of course salinity has dropped. I have read...

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