I have set up my larger aquarium of 45 gallons and I used my old filter media for my new filter and all my old gravel and decko its been 2 weeks so when can I add one angel fish ( small about 2' in hight) Ive been planing so far, the tank is stocked for about 15 gallon worth of fish maybe less? I have another small aquarium and I cant fit it anywhere in the house so I cant quarantine my fish is there a alternative?