I have a 27,000 gallon above ground pool. I can’t seem to keep enough chlorine in it. I go through shock and 3”tablets so fast it’s becoming unaffordable. I have to put in about 6lbs of shock and around five 3” tablets a week and still the levels get super low. I take my water to have it tested and they keep saying more shock and it’s always something extra also needed. My pool gets full sun. It was built when I moved in and the one jet return isn’t enough circulation and will get algae very quickly… like two days if it hasn’t been swam in even with the shock threatment. Pool cleaning/chemical treatment companies will not help out because it’s a half above and half I ground pools the middle goes to around 7 feet deep but outer edges is at 4 feet. Full sun constantly. Any suggestions? We have a great filtration system which is glass medium. I’m just lost and broke at this point. Beginning of the season I ended up putting around 15-17lbs of shock in the pool cause of all the problems (which was recommended by pool company who tested the water).