Does a Long-Uninhabited Tank Need to "Re-cycle?"
I've had a 5.5 gallon for over 6 months, the ammonia, nitrite, and even nitrates are all at zero. It has just been sitting there growing out with plants and a nice population of pond snails, happy as could be. I'm getting RCS soon though for it and I was curious if I should add some fish food and try to raise the ammonia up and basically do another cycle, out of fear bacterial colonies may be diminished. Or should everything still be good?