My pool was perfect before I left for vacation on 7/30. I had my neighbor pour bleach daily into the pool and clean out the skimmer. When I came back, I decided to backwash the filter since it has been over a month since I had done so. I believe I might have a small DE leak coming back through the return line. At the beginning of the season in May, I replaced all the grids with new ones and my pool was crystal clear with no signs of DE coming back through the return line. Once I came back from vacation when I tried to backwash, I poured DE into the skimmer and found out after the fact that there was no suction and the DE spilled into my pool. I opened up the basket with handle from the pot connected to the pump and found a large amount of pine needles and DE media which I cleaned out thoroughly. I've also vacuumed the pool twice to remove the DE. Now, I also notice small air bubbles coming out of the return line which I didn't notice before. I'll check the pool again tomorrow to see if there is any DE settling on the bottom. If I do find more DE there, do I need to open up the filter like I did at the beginning of the season to find a possible hole in the grid? This is so frustrating since I had this problem previously but it went away when I replaced all the grids. Is it possible for debris to pass through the pump into the filter and cause holes in the grids? I have been using the BBB method. Thank you for your help!
Kayak Above Ground 5000 gallon pool
Leslie's Crystal Clear II DE 24 square foot filter
Pentair Dynamo 1 horsepower pump