RO topoff & TDS creep

[Dave C]

Originally Posted by mark

Getting back to the range I have (1/4" variance) perhaps thats the reason for my low TDS as opposed to waiting (time between cycles) to drop 2 inches.

Could be. I doubt my water level fluctuates by 1/4"... much less then that. I'm going to leave my float/solenoid on for the day and test the tds of the water entering the sump throughout the day and see what it measures. Could be making something out of nothing. And right now it's only servicing about 100g of water in my 65g tank/35g sump system. Once I add a 225g tank with sump it might really not be an issue as it will probably be running much more often & for a longer period of time. That's especially true since I'll have a high/low float on the 225g tank so the water will drop 1 or 2" before the RO will kick in and then it will run for awhile to top up.