Pump is under warranty (Hayward.)Not sure about the leak- just keep watching it. Is your equipment still under warranty?
Be careful not to overshoot the cya!
Some brands seem to dissolve better than others. If the water is cold that can slow it down. So long as you kept the pump running its ok. But if alot went into the filter it could take longer to register on the test. Just count what you added as being there. Don’t backwash until it registers. I put some in a sock in the skimmer the other day for it to get mushy & when I went back about an hour later it was all gone already! My water is 81 degrees.
The CYA I added a couple days ago was about 1/4 of what pool math said to add to go from 30 to 50. So tonite I'll add 3/4 of what math said to add today (it's still at 30).
I added muriatic a couple days ago but PH is still at 8.0, more today hopefully will bring it down and my high ALK also.
My water was around high 60's. It's over 70 now (heatwave we're having)