I’ve been using the 14 lb bags of Fritz Rpm Salt. The blue one which says Alk should be 8.5. I bought a bucket of the same salt and now when mixing at the suggested temperature (70-75)my Alk is testing at 11.5 a day after mixing. I heated another batch of water to 78 degrees and alk is testing at 9.5. Are there any recommendations to get my Alk down to 8.5 when mixing a new batch of salt water? Thank you!