I've been using the techniques in these forums very successfully for several years. Thank you!
Unfortunately, this year is a disaster for my pool. We opened late, had a lot of algae and it took a long time to get up and running. I even shocked at my mustard algae level to make sure that everything was gone from the pool. Since then, have had to shock multiple other times. The overnight test comes back fine, but water is always cloudy. It is taking weeks to clear out the stuff that is left. I cleaned the filter (filled with stuff) and thought that was it. However, the returns still seemed to have low pressure. I fixed a small leak at one of the plugs. No improvement. The suction seems fine if I stick my hand down by the hole, but I can see that the movement in the deep end is minimal and the returns are lower pressure than they have been before.
I replaced the gasket on the multiport about a year ago, but it was very hard to remove all of the debris. Although I have a ball valve at the waste line and my waste line goes up a wall, sometimes i see dripping there for almost an entire day. Then it goes away. The multiport handle seems a bit looser than I remember from years past.
I have run my pump constantly, when it usually only requires 12 hours once it has been shocked.
I have repeatedly backwashed the filter after shocking.
Although my liquid filled pressure gauge goes up to 30 when I first turn it on (because i am well below the surface of the pool), it has almost never gone up beyond that. So now I'm not backwashing.
I have a painted pool that probably has to be repainted and I see a lot of the paint coming off in a powdery way when I vacuum. Also my calcium levels are low, because the minute I get ready to add it, I need to shock again. Maybe this is what i am seeing? But why won't it filter out any more?
When I return to non-shock levels, they drop about 2-4 points a day in FC. We have had a very hot summer here, so I am assuming that is normal? CCs are always pretty much nothing.
Any ideas about what my next step should be? I am stumped.
Thanks in advance for your help.