Overflow problem, any engineer out there?

[ScubaSteve]

Originally Posted by Coleus

oh no problem :-) i had bad day yesterday and probably misunderstood your joke.

No problem. Yesterday was about the same for me

I don't know if you mentioned this but why aren't you having the sump under the tank?

One other solution that you could think about is to have a small sump under the tank the handles the overflow and emergency drain and recycles it back to the tank, then have a small return pump send water to the main sump for treatment. Flow matching because a bit more challenging here but it eliminates the problem of having an emergency line that flows uphill.