Auto Top off system

[RagWeedDWC]

I recently needed to ask a friend to check on my system, hate to do it. I cobbled together a auto top off system to avoid that need in the future.

Question is, is there a dependable off the shelf system that other folks are using?

Has the ability to top off from a premixed reservoir when the level of the grow reservoir hits a low limit, then stops when it has reach the high.

 

[BakedMoose]

A float valve with another reservoir(s) situated above the main reservoir (in elevation)