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- May 22, 2015
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I just got an ATO unit. I saw a youtube video of a person who made an ato unit to do small water changes every day for him. He used 2 5 gallon buckets. I am new and I am not sure how to do that. Does that require 3 float valves? A full for the bucket it is draining to, a "water change" low level and then a full refill valve?
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