I did maintenance on my filter on Wednesday, afterward it has been making a whirring/whooshing noise about once every 60 seconds followed by the expulsion of bubbles from the out flo. I really don't think the water is circulating beyond that. I have unplugged it several times and have tried to reseat the part that holds the lines, and I have made sure the lines are full of water, I have made sure the canister is full of water, I have unsealed and resealed the top of the filter, and I have looked at the seal around the top of the filter and it appears to be fine. What have I missed, and what else should I do. I can order parts on the 11th if I need to and I have a Magnum HOT that I can plug in in the mean time if I need to. Please help.
linda
linda