au01st;496903 wrote: Yes. It's a complex system since it runs both through my kalk reactor and runs pure RO/DI. Basically it's set up so that it's A) on a timer, B) on a pH controller) and C) on a float switch. Standard top off uses kalk unless the pH spikes too high, in which case it will stop the kalk, but still top off with RO/DI.
Then the timer and/or float would cut off the ATO.
Besides, my pH runs really really low, and it's all I can do to get it to 8.2 at the end of my photo period. pH has only ever spiked once or twice, usually when I add new kalk to the reactor.
For whats its worth, i manually turn mine on and leave it on over night then turn it off in the morning and it usually fills up 3/4's of a brute....id like to find a diff way but it works for now
