Hey everyone time to build a propagation tank so here is what I want to do. I want to use all Rubbermaid stock tanks, x 2 50 gallons connected together with a 2, 3 or 4 inch bulkhead to connect the water. This will be plumbed into a 100 gallon Rubbermaid acting as the sump. My biggest worry is the connection for the two 5os I hear the Rubbermaid will flex causing a leak from the bulkhead is this true ? Any advice please let me know. I want this to be easy but effective.