Cycling a tank is over-rated, the only difference between a cycled tank and one that isn't is "beneficial bacteria" and the only reason it's beneficial is to automate the process of reducing toxins in the tank for lazy people who don't want to do water changes. You can do the same thing with weekly water changes. I don't give cycling or beneficial bacteria a second thought. Fish enthusiasts get into this to enjoy raising fish not to become bio-fish-scientists. As long as you care for the fish, they will be happy, healthy and thrive. My tanks are cycled but I didn't give it any thought and I believe more often than not, the only reason you lose a fish is because it was unhealthy to begin with from the LFS
. You would have to have some seriously bad water for several days before it would impact the health of the fish and if you did then it's your fault. Weekly water changes will take care of most problems. I also use only Microbe-Lift products that take care of the beneficial bacterial thing for me. Fish keeping is only hard if you try to be all scientific about it. Just feed them (in moderation) and enjoy them, the rest will take care of itself. Remember too everyone's experience is unique, what may happen to one tank or fish will not happen with another. An example, the advice never keep an oscar with an oto, the oscar will eat poor oto. In my experience this is false, I have an oscar and oto getting a long great. Another, never add fish to cycle a tank, they will die off one by one and it's inhumane. In my experience this too is false, my fish handled it quite well. If the water is clean fish will thrive as long as they are healthy.