Ok so i am gonna make my sump with a 40 breeder i want the tank is a 50 gallon drilled the bulk head for the water to the sump is gravity fed there will be pvc and a valve so i can control the flow. the elbow will be right at the breeder tank sump for the scrubber live rock sand then the return. there is no glass at all in the sump can anyone just let me know if this is ok i attached a pic