Hi,

On the new tank im setting up im thinking of running two waveline dc 6000 pumps instead of one larger pump in case a pump fails I will have a backup.

Eventually this take will have 50 or more discus in it so trying to eliminate single points of failure.

Also has anyone tried joining the return flow from two pumps into one pipe and also tried having a one way valve so if there is a power failure you don't get suction out of the return to the sump lower than the overflow bulkheads?

Thoughts appreciated.