The pool IS 5800 gal. I put new sand in the filter every season just to be safe, my three shocks consisted of 2-1 lb bags of green out twice and the last shock was 2-1 lb. bags of pool shock plus 19 0zs of wac./groan. added I 2.56 bottle of bleach last nite to try and get the FC/free clorean, this morning added PH up and the pool ligthened up somewhat but still light green , any help further would be appreciated greatly cause this is getting exspensive now AND ANY general STORE PRODUCTS THAT CAN REPLACE THE POOL STORE ITEMS which are expensive would also be greatly appreciated as I live on a fixed income and trying hard to keep the expenses down a little as this season to open is getting out of hand already TIA...