The main point for using an RO is to realize that you either should not RO ahead or if you must, store the concentrate at 28-30F, even in a tub of water with ice surrounding it and a little salt to lower the temperature will help. Concentrate spoils fast. That is because you not only concentrated the sugar but also the micro-organisms that feed on the sugar.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.