tds meter question

[Delphinus]

I had actually been using my RO/DI directly to the float valves on my tanks and let them kick the solenoid on and off as required, but I found that I was exhausting RO membranes prematurely this way. At one point (you could even read about it here, there's a thread about it somewhere, I think from about a year ago) I went through 3 membranes in the space of a couple of months. So that's why I switched to filling up the reservoir, as needed, in one go (that's what was suggested to me anyhow). Maybe I should switch to a smaller reservoir - one that requires refilling slightly more often than the current 10 days it seems to offer me. Moving the float valve lower into the tank ought to do the trick.