First time pool owner and it is currently a swamp. I have been trying to do some research but the more I read the more overwhelming this process becomes. I bought a k-2006 test kit and the first thing I did was test my CYA. The black dot disappeared before the water even reached a reading so my CYA is extremely high and I keep reading that my best option is to do a refill. I have some concerns on doing a refill because I am in California and because I am not sure how to partially drain my water without damaging anything (if draining is my only option.
Here are some pictures of my situation.
Any help and guidance on where to get started would be greatly appreciated.