Hi Ahhsomeguy
Thanks for your response. I made an assumption that it was bio-gunk. Thanks for that repot that was quite interesting. I’m going to purge it all again I just have one question if I may. Would you please the cleaner directly into the filter area where it can be drawn through the pumps or directly into the water. I think this is where I made the mistake as I just put it in the water. I guess I’ve kind of answered that myself. The filter area would be best. I saw that it was suggested to leave the cleaning fluid in overnight then run pumps again, then empty. Is this the best way