Hi brand new- will have a 125 gallon reef tank and am trying to figure out my qt set up. I understand the theory of keeping a sponge in my sump of my display tank for bacteria seeding in the future qt tanks (if I break down in between uses). However I will just be starting and cycling my display tank and I want to quarantine my first fish. I will have live rock and sand, biospira in the dt...so as far as cycling the qt tank-which will be barebottom w pvc pipe, sponge filter, air pump, heater and light...should I just take water from my display tank after its cycled, and add it to qt (thinking 10-20 gal qt) then put my fish in?? Can't seem to find any guidance other than using sponge from display tank. Thanks!