Installed the pool last August and have been using the crummy kit they supplied (Pentair 78HR). Guy that walked me through pool school said the kit was not adequate and suggested I purchase a better one, so I just bought a Taylor K-2105. I did some tests with both kits and was surprised at the difference in some of the numbers. The Taylor showed PH 7.8 and TA of 90, as opposed to the Pentair readings of PH 8.2 and TA of 60. Is this normal for kits to not agree?