I'm new to this forum, so thanks for any assistance.
I have an older marcite pool (details in signature). Even with a 1 hp pump and 150 cu ft cartridge filter running 7+ hours a day, and SLAM method and maintaining chemical levels, my levels keep bouncing and I feel that it is due to low circulation with 1 return and 1 skimmer in the shallow end, compared to more modern designs with multiple returns that allow for more circulation.
Is there a way to adjust for this and make an older pool more effective? How can I tell if the main drain line to the skimmer well/pump is flowing well? I tried a drain king to blow out any debris, but didn't see any great difference. Could you use a shop vac to blow out the main drain line?