I forgot to add one equipment update. Four or five months ago I let the reservoir run dry on my JBJ Nano-ATO and the pump burned out. JBJ sort of sells the pump separate for around 50 dollars if you can find it. I only found one and I didn't trust the seller so I bought a replacement ATO. Since the JBJ had worked flawlessly for 18 months or so I bought the same unit again and just used the pump. It wouldn't stay sync'ed up correctly (slowly over-filled) so I replaced the whole unit but it still would not stay sync'ed. I pulled it out and I'm doing manual top-off while I decide what ATO to use when I swap tanks.