This is why I strongly recommend a qt.
Mine is a jewel 125 rio off ebay £30, I only fill tank half full of water due to less costs of meds and water changes.
cheap sponge filter £8
couple of pvc tubing Free
2 bits of rock Free
Atu off ebay £18.
Cheap Chinese light £5, Used just to check on fish (fish don't need lighting)
Total £61, Flame Angel £80 plus other possible livestock loss
Its a no brainer for me.
Anyway I hope it sorts itself out without too much problems.