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Program which uses 2 float switches to fill RO/DI reserve:
If Time > 00:00 Then DM1 OFF // Init dummy timer to off
If Switch1 Closed Then DM1 ON // If lower switch closes then turn on dummy timer
Max Change 030 M Then DM1 ON // Allow the timer to stay on long enough to fill holding tank
If Time > 00:00 Then ROD OFF // RO/DI defaults to OFF
If Timer DM1 = ON Then ROD ON // If dummy timer is on (because low water level hit) then turn on RO/DI
If Switch2 Closed Then ROD OFF // If high water float hit then turn off RO/DI
In short the Max Change should be large enough to allow the holding tank to fill + a little. The Max Change gives you a backup in case Switch2 fails. If the holding tank fills before Max Change time then switch2 will float and turn off RO/DI
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Current Tank Info: 225G, BK 300 Deluxe, Deltec PF601, Precision Marine Kalkreactor, 2-LMIII+6 pumps, SpectraPure UHE, Apex, LunarSim, Tunze 6305s. Mixed reef, clam, fish, etc.
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