This is our first year with a pool. The water stays pretty clear for the most part but I'm having issues getting the cya to show up on my test strips. No matter how much I add, it always reads 0. The hardness is always really high also. Now there is stuff on the bottom that looks like dirt but clouds away when pushed with a vacuum. It keeps coming back no matter how many times I sweep. I don't know if it's algae, sand from the pump or pollen. I tried to upload a picture but it keeps saying it's too large. The chlorine seems to go pretty fast. I bought the pucks but later got liquid because the pucks never seem to dissolve. Ph is usually at 8.4 alkalinity at 120, cya always 0, hardness between 500 and 1000, total chlorine 2 and free chlorine between 1 and 2. I don't know what I'm doing wrong.