cycling my 220g

[abcha0s]

I'd say your tank is fine to start adding fish. Just add them slowly. No more than one or two as first additions.

The thing about cycles is that it's all about 'balance'. Bacteria colonies will reproduce in accordance with the food supply. If food runs out, the populations will start to decline.

If there was minimal die off when you transfered the live rock, then the bacterial colonies will be somewhat stable. However, they won't stay stable for long. Adding a couple of fish will help to balance out the bacterial food supply.

The risk is an ammonia spike, but there would need to be a rapid increase in organic matter in the system. The ammonia will only be detectable if the breakdown of organics outpaces the rate at which the bacteria can consume it. This is when the bacteria really start to reproduce rapidly, but I don't think that it's relevant to your current situation.

- Brad