I’m having problems with PH And cannot get it to come up. On my Taylor test kit it stays at the bottom of the color chart what looks like to me a 7 or lower. Last summer I replaced the sand in my filter. After studying my issue every time I put soda ash in the pool it gets caught in the filter because I can see it when I back wash. at first I did as I always did and slowly put it in my skimmer. I even tried putting it in a bucket and completely mixed it in water then pouring it around the pool. i treat my pool with glandular chlorine and it completely Dissolves and does not get caught in my filter. Is there something else I could try to bring up my PH?