I'm facing the first purchase of livestock for my 75g FOWLR (that will be quarantined) in about a month.
I am picking up a 10g glass tank. I have a spare small PH, and a spare heater. I have some fake rock to put in for security/hiding. I also have a spare HOB Aquaclear 70 filter.
My question is, do you experienced guys keep the QT running and ready all the time, or do you just fill it with water from the display (very convenient during a water change)? I assume the latter; i.e. don't even fill it until a day or two before a fish goes in, then drain it until next time. I was thinking that moving some LR from the display would be bad, because if the fish needed to be medicated I'd have to consider that LR as no good. Putting new LR in doesn't make sense for obvious reasons.
So, my instincts say to do a BB tank with some cover, use 10g of my existing water, and run the PH/heater/filter (carbon only).
If I start with good, cycled water from the display, will the conditions stay good for a couple of weeks with no LR in the QT? Is a power filter/PH/heater going to be adequate to keep the QT running well for the time I need it? I DO understand that I'll have to test my water in it, but I wondered what you guys do day-to-day with a QT both while it is in use and not.