Great info PoolDoc!

2) So with all forms of chlorine adding some salt, no need to worry about rust with bleach then ;-) Re CYA biodegrading, I will keep an eye on it anyway and can add as needed. I just don't expect much loss if maintenance of FC level prevents slime.

3) To evaluate the LSI, I have so far used the watergram wheel in the K2006C kit *and* the water temp provided on the display of my Hayward H400FDN heater. I wonder what this temp really corresponds to now that you're mentioning this. I believe it is really close to what the temp is in the pool. Based on your explanation, I understand I only need to adjust the temp reading at the heater by +20 when it runs. I will take a look at the LSI calculator.

Re vacation/away time, I found a procedure about this on the Super Simple Startup Recipe page that does use polyquat. I guess this is what you were referring to. Interesting.

Re protozoan cryptosporidium, I found the procedure apparently from the CDC to fight it at this link: http://www.floridahealth.gov/healthy...ponse_reco.pdf