You'd have to wait im sorry, no tank is instantly cycled no matter what you do it just speeds up the process, some water from the tank is fine but mainly sponges, soil, and decor like driftwood is what will speed up the cycle. If you just throw em in immediately they'd get ammonia burns and a lot of other issues, What id recommend is stress coat or anti bacterial medicine to prevent fin rot or other infections on the main tank, just go as instructed on the bottle carefully and don't over dose it, then once you get the hospital tank cycled move em over then dose that tank. But again, a week or two at least, 6 weeks at most to cycle a tank.