So for my next trick
1 x
+
1 x
Automated shut off of return line to tank when return pump is stopped or in the event of failure, thus stopping sump from raising too high, this also allows for accurate auto water changes.
Only thing missing is the availability of the metric fittings required for the flow sensor, you cant buy them in the USA or Canada
So when i go to the UK I will pick myself up a set.