OOPS. Just noticed your CYA reading used to be 70, but is now 100 which means it could actually be higher than that. So, as Carl said, you might consider doing a partial drain and refill. If you choose not to do that, you'll have to shock to 25 instead of 20 and then when it is all cleared up, your maintenance level is going to be between 8-15 instead of 5-10. Let us know which is your preference and then we'll help you go from there.