Thousands of tiny black insects in pipework.
#1
My pond is now pretty healthy - water stays clear, fish doing well, just a little weed growing on the liner...BUT
every time I look in my filter, or my UV filter, or my pump casing I am horrified by the thousands of tiny black insects firmly attached to the pipework where water flows.
Is anyone familiar with this (I will take a photo if necessary) and can tell me if they are a) good or b) bad and if bad how to get ride of them.