Danny, I've seen this asked before, so I'm going to ask you now ... What did you use (or how do you know) your CYA is over 200? Reason I ask is because some test kits, at least the TF-100, only go up to 100. Anything over 100 is treated somewhat as simply "exceeded". We might have some more advice for you based on your reply. Also, consider adding your pool info into your profile signature settings for the TFP experts to see in advance. Thanks.