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<<I have no idea why you are getting different answers. Were you doing the tests in the same lighting? The CYA test should be done outside with back to sun with the tube at waist level. This is really what set the next step. If the CYA is 100+, you really need to get that lowered, almost more...

Just re-checked the pool and I got 850 on the CH. The result depends on when it actually turns blue versus purple. Wife says its blue @34 drops in a 10ml sample which is 850ppm. It's very subjective though since its dark purple at 30 drops. Strongly considering at least a 50% drain and refill...

New supporter, and 11 year old pool owner here. I have been reading feverishly for the past week or so trying to get a handle on TFP methodology and all the chemistry. I "thought" I had a good understanding of pool chemistry, but I've learned a ton in the last week or so. My pool is an 11 yr...

Just joined. I've been reading up on the TFP methodology for a couple of weeks now, and want to support the forum. Unfortunately just ordered the Taylor test kit from Amato on Amazon, so I won't be able to take advantage of the discount on the TFP kit. (Wish I had seen the kit before I ordered...