Quote Originally Posted by RayAllen View Post
Any ATO with a float switch take out and clean often or at least when you do your water changes. Salt creep will eventually cause a failure and you will overflow or at lease dump to much fresh water in at one time. Been there done that....
which brings up another point...your top-off container should not be able to overflow your sump in the event the entire container was emptied into the sump due to a malfunction. This has happened to me before. So that may change the size of your water container or the water level at which you run your sump.