RO to Sump ATO

[gpwdr]

I bought BRS 6 Stage Universal Plus RO/DI System - 75GPD.

Looking for an auto top off that will connect from the RO unit to my sump
The water drops 1 inch with the one I have now. I'm looking for something that can maintain the water level so the protein skimmer stays the same level.
I have a large sump and a one inch water drop affects my system to much.

Have any suggestions please.

Gene

 

[Trex]

I would use an ATO reservoir, and not directly run your RO to the sump -- 2 issues.
First would be TDS creep from the RO/DI unit tuning on/off frequently. Better to run the RO/DI for extended periods of time, as opposed to frequent on/off.
Second, your RO/DI could stick on --- at best lower your salinity, at worse a flood. With an ATO reservoir you have finite amount of water.

Even with a good ATO, you are still going to have a fluctuation in the sump's water level -- install a baffle for a skimmer chamber. The water level will stay constant and your skimmer's performance will be greatly improved.