8 hours of top off/flooding kills almost everything

[Seriak]

That is why I like the tunze ATO. It has an upper float valve that will prevent the ATO from filling if it is over a certain level. I have also combined this with a 10 gallon resevoir that shouldn't kill anything even if everything was dumped into my system. The only problem is I only get about 5 days before my resevoir is empty so someone does have to fill it when I go away for a week.

Sorry for your loss.