So - a recent thread reminded me of a question - how often do people clean their skimmer neck/cup. I do not do it regularly - and it tends to have a thick coating of 'gunk'. I always wondered if that was putting bad stuff 'back' into the tank - though I dont think it does.
Answer the poll - (please) and in the comments explain why you use whatever method you do:
Answer the poll - (please) and in the comments explain why you use whatever method you do: