Shot of my flower room rez----the 3/4 hp tamdum pumps are syncorized 15 sec on 15 minutes off, the manifold has valves to divert the nutes to drain out for flush and
reload. each rez container is equipped with a "rojo" float valve-----hate that splish splach sound. Black box at left is a 1/4 hp circulation chiller----easily cools 25 gallons in
bottom tank-----and additionnal almost free feature from the chiller pump is to bleed nutes to the upper tanks to help equalize the nutes in the whole system.
a~~~