Auto ATO and AWC

[moe103]

I'm trying to set up an ATO and AWC. Currently, I have the line from the RO/DI connected straight to a float switch in the sump. I want to avoid the TDS creep from constantly running a small amount of water through the RO/DI to replace the evaporated water. My plan is to have the RO fill a reservoir tank with a high/low switch and run the Tunze osmolator out of this reservoir. I am planning on using a 20 gallon Brute garbage can as the reservoir.

I would also like to use the DOS to do daily water changes of 3gpd. I have a second, larger 50 gallon plastic drum that is also connected to the RO. My plan is to fill it, mix in the salt and then set up the DOS to do the water changes. In order to keep the salinity stable I would also have a high low sensor to keep the RO from constantly refilling the mixing tank.

I would like to automate this system so that the Apex will fill both reservoirs before they run empty but at the same time only fill large amounts at a time so as to use the RO/DI more efficiently. How can I control both the high/low sensors and the RO? Would I need two FMM since the 4 high/low optical sensors would take up one FMM? Is this overly complex? Is there a simpler method?

Thanks

[bluerrpilot]

Tunze 8555
https://www.bulkreefsupply.com/ro-wa...ler-tunze.html