wondering if someone could help me, i have a green spotted puffer in a 10 gallon tank (hes a little guy), will be converting him from fresh to brackish water in this tank (bought him freshwater), my question is how quickly can this process be done? the idea was to go from fresh to brackish in my 10, then move him into my 29 and go from brackish to salt, then into a future 55 gallon, need to know how long it will take