how tall is that rack? I wanted to do something similar, but for 2 water tanks, fuge, sump.
It'd go tank on top that would be empty, tank below that which would have like 40g of salt water connected to the fuge & sump. Fill empty tank, add salt, turn valve and put that online with the fuge and sump and take other 40g off line and drain until next water change.
Are you planning on breeding the clowns or just a clownaddict? jaja clownaddict