Since you dont have a test kit yet you dont know how much they could be suffering. Ammonia poisoning is an ugly thing to get. You will prob have to do alot of water changes. It can be done, cycling with fish and crabs but you may lose a few.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.