A hospital QT just really needs a airstone since meds could kill off the BB ... Besides, one should be doing plenty of PWC
's in a hospital QT so the water shouldn't get polluted.
New stock QT I'd say needs a filter since the fish'll be in there for a month at least. .... Either QT should have a heater.
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.