Originally Posted by
renogaw
and if you know the life cycle of ich, you will know that 90% of the parasites will live either in the sand or on the fish, and the time inbetween is very small.
yet again, uv sterilization will not cure or contain ich.
Right
What are the odds that all of the countless larvae developing in the sand will get grabbed by the U.V. intake before they find a fish? If you search and read the life-cycle of these parasites it makes this pretty obvious (at least to a dim bulb like me!) All you need is one live bug, and the cycle never ends.