I have been using the same big jar of Kent Marine Kalkwasser and my Ph as everyone knows has been very low in the am 7.5 for well over a month now. So I went threw all of the low Ph fixes and nothing seemed to work.. So I came to the conclusion that I would have to turn off my CR. But then that would throw off everything else so I left it running. I ran out of Kent Marine Kalk and went on the search for Mrs. Wages Pickling Lime Powder locally. Well It's been two days of waking up and finding my Ph at 8.2 at 7am.. Needless to say I am sticking with Mrs Wages and it was only 2.49 for 16oz.. I can't explain the Kent Marine and I don't really care to because I am so happy now..