My husband and I have just purchased a home with a pool and we are new to pool ownership. When we had the water tested the CYA levels were through the roof. We have done 3 drains, 1st a foot. Next day 2ft. Next day 1ft and finally got the CYA level around 90. During this time we realized the pool had zero chlorine in it and started growing algea. I think we got an algea bloom. We started shocking with bleach but have found no pool store that carries a way to test higher than 5. how do when know how much cl we have added. We have ordered the FAS-DPD test but it is not in yet. Any suggestions. Also, the ph is climbing due to the high amount of CL. Should we add any muratic acid to lower it during the shock or just keep adding liquid bleach. Any other insite would be greatly appreciated!!