I am in to year 2 of pool ownership and self maintenance. I have had my fair share of issues along the way but nothing some research here couldn't take care of.
Right now my water looks great and test results confirm this...except for my CH reading. I usually only test this about 1x per week and prior to this it used to hover around 300-350 no matter what. I started testing it more often when I noticed the increases. My test today showed 475. It has been on a gradual rise since about the end of April (4/16 tested at 325.)
Timeline of some "different" events I had and of the CH readings:
4/9: replaced cartridge filter of unknown age
4/16:CH tests at 325
4/21: pump impeller sheared. System was off for 3 days while a new part was ordered and I installed it
4/29: CH test at 400
5/11: CH 375
5/14: CH 400
5/17: CH 425
5/21: CH 400
5/28: CH 400
6/4: CH 450
6/5: CH 475
Between those dates I added only bleach and muriatic acid as I had always done. I did add some baking soda on 5/14 as my TA had gotten a little low.
So I am a bit confused here. Why would my CH readings be so high after staying around 300-350 for more than a year? Should I be concerned? Everything else is testing fine and the water looks great. Is my testing flawed? If I do need to lower it, is my only choice draining water?
This is central florida so we do get a lot of rain but again my CH was never this high before. I haven't had to lower the water level in a while but could probably use to drop it down about 1 inch.