I have an older model 4000# Hydrohoist floating lift with two tanks. I need to add a third tank to be able to pick my boat up. I already have a tank. Would I need to add a second control box or could I add the third tank to the hoses controlling the 2 original tanks? I would assume that if I added the tank without adding another control box it would take longer for the boat to be lifted out of the water.
