My QT is a bit overboard for equipment
20g QT has;
ATO
RKL w/SL1 and pH probe
100w Eheim
Aquaclear 50 with surface skimmer attachment
Quiet One 1200 w/8w HOB UV ( UV turned off for first week or so )
Ammo Alert
Air pump and stone ( back up in case pH dips below 7.8 )
15w T8
Eggcrate
Computer fan on the eggcrate, and controlled by the RKL
Chems;
Stability
Am Guard ( just in case )
Brad's great suggestion of putting the AC foams in my sump to seed bacteria was probably the biggest reason for my QT success
The foams were in the sump for probably 2 months in the first chamber, before my socks
The QT water level is about 1/4" below the trim so the filter and HOB sterilizer splash return water for aeration
I fill the QT with new water, but have used DT water in the past
When the new fish are coming home, I put the foams in the AC
Once the fish are in, I start using Stability as per instructions
I monitor ammonia, both with the ammo badge and a test kit. If I see any high ammonia, I dose Am Guard and continue monitoring
Once I'm past the initial Nitrate cycle, I turn on the UV, keep monitoring params, and usually do a weekly 50% WC. I rinse the foams in the old water and swap them top to bottom
My pH was never low enough to worry about, even during Hypo, so I've never had to use the air pump yet
The WCs are done with new water until I'm ready to transfer the fish, then I use DT water for a change or two to ease acclimation