If you make up some water before you add any fish to the QT tank you can store the water in CLEAN used milk jugs (the 4l ones). Sponge filter is awsome, to get the cycle going just use a couple gallons of water from your main system when you do a water change. Instant cycle. For QT remember to have seperate stuff for that tank, never use nets, filters, water etc from the QT tank and always feed, treat, gaze and generally admire your main tank before you do the QT tank and once QT is cared for, wash up like crazy.
QT tank should never be used for anything else once it has had any meds given, silicone can hold traces of meds and leak them back into newly made up water. Oh and one more thing, QT for fish shouldn't be used for corals, have a seperate QT for corals if you need to, and the fish QT doesn't need light, room light will be sufficient.
Douglas
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