Hello.. i have a Hayward Vari-Flo XL valve model SP714 sand filter. Its been running 24/7 for 7days after a super shock due to extensive algae growth. Pool not clearing. Vacuumed for a few minutes, removed vacuum attachment and the green algae water was pushed back in pool thru the jet. I did clean filter basket and found a bunch of sand which i cleaned out in order to put back in. Barely any suction in vacuum, filter has not "told" me it needs to be backwashed as of yet and its been 7 days. I do believe spider gasket is bad due to water dripping out of waste spout. Not sure if this has anything to do with the problems above. Also there is sand in the looking glass on filter. Looking for suggestions on what the problem might be. Thank you in advance ?