I am now doing my ATO with a doser (Neptune Dos) on Channel 2 of my Neptune Dos pump. I dose Vodka on Channel 1.
Initially when calculating evaporation in exactly a 24 hour period, I measured the amount I had to manually top off. Programmed the Neptune Dos for that amount (8000 mls / 24 hours). The Dos calculated the ATO to deliver approx. 59.4 mls every 10 minutes (forgot the exact amount off hand). The Vodka is dosed at 0.9 mls every 6 hours. The water top off actually flushes the Vodka down the line (about 40 feet away from DT). I fine tuned the ATO up to 8500 mls / 24 hours and have a float switch in the sump. If too much water is added, float switch will stop dosing for a bit until level drops from further evaporation.
This setup is working VERY well. In future, if I had the need to dose more (CA or Mag.), just adding another Dos to the system and good to go.
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