I ordered one and should be in transit right now, and I am trying to prepare for the set-up. Instead of buying a reservoir/large rubbermaid trash can for the RO/DI water (since my tank is relatively small), can I just use the usual 5 gallon plastic jugs as a top off reservoir? I guess my question is, will the pump and whatever equipment needed (float switch?) fit into it? Are there any problems with this?