RO/DI setups

[mark]

to my mixing station I come off the rodi to the water barrel. Water barrel has a float valve and a small JG type valve between the rodi and the float. When I want to fill the mixing barrel I open the JG valve a the float prevents a flood.

You go do similar, every few days refill the brute, your ATO doesn't short cycle your rodi.

[daplatapus]

Anyone ever use one of these? Although, now that I've thought about it for 2 seconds, I guess an Apex could accomplish the same thing...
http://www.buckeyehydro.com/hi-lo-ta...el-controller/

[mark]

Apex with 2 float switches, or DIY with couple of float switches and a relay. Big thing is upper and lower limit you can set a distance (volume) apart.