Id suggest as much bio media as you can. Sounds like your hardware is covered besides that.
Depending on where you get your fish, you may have to adjust salinity to match the water in the BAG. Then slowly adjust Up.
Many breed and ship at 1. 019 commonly. Thats pretty easy, just turn off the ato and top off with salt water.
Make sure the water is well cylced(15days?) with bacteria, Dr tims method or use brand new fresh scripps water (san diego Skip cycle).
Youll have to choose the type of QT you are doing. Some folks don't prophylacticly treat with copper. A 2-3 week observation, then de-worming treatment.
Copper is 72 days because of the lifecycle of Ick and other parasites.
My only advice is to let the fish rest once in QT. we can actually stress a fish to death. So a fish new to QT then blasted immediately with copper can be a bad combination. Mixing meds too quickly can do the same. De worming is a low dose of poison basically.Kills little bugs, large animal just doesnt feel well. Cats and dogs respond similarly. Sick the first few days after he meds. Copper is the same. It messes with digestion , slime coat production etc. So IMO, go slow. After copper, most of the gut bacteria is dead and the slime coat is reduced.(like chemo, anti biotics in humans, the water in copper pipes), so good food, live or LRS, is recommended.
This guide is pretty spot on. Hes a bit clinical for my tastes(mixes meds, goes too fast, big fast WCs) but the info is all there.
https://www.reef2reef.com/ams/how-to-quarantine.232/