Quote:
Originally posted by oldsaltman
Bean, my current ATO only has one float switch level and a timer turn that off for an hour each day so I can do an automated water change. That way my timers/pumps can draw out 1g – 1.5g of old water and replace it with the same amount of new saltwater. The one float switch insures that whatever comes out is the same amount that goes back in. With the two switches the sump level will vary at any given time, so my previous design want work. Could this design be modified so that at some given time once every day when the water level is at its high level a timer/relay would know to turn the ATO off for a set amount of time? If that makes any sense?
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Sure, you would just use a relay on your timers output. The NC contacts would be the TOP-OFF power and the NO contacts the water change power. That way, when the water change kick in, the ATO is not powered and vice versa.