I just picked up a used 440 gallon spa and have a few questions. I intend to decontaminate it, so I ordered a bottle of Spa Flush & new filters. First I need to fill the spa to test out the motors, blower, heater, check for leaks, etc. So once I know everything is good:
1. Should I bother with balancing the water? or can I just pour in the spa flush and follow directions?
2. It may sit with water for 2~3 days before the spa flush arrives (couldn't find it locally), should I be adding bleach for those few days?
3. Once the spa flush is complete I planned to do a 2nd flush to be on the safe side, can this be done with cold water?
4. After decontamination and I'm ready to start-up, can I balance the COLD water? Or should I wait until it's heated?
FYI, I plan to use the Chlorine method outlined here on TFP, and I've purchased a new TF100 test kit and Salt test strips. Once the water is completely balanced I would like to add salt to the water to around 3000ppm using the salt recommended on this site for adding to swimming pools. Will this cause any issues being that I'm adding it to a hot tub rather than a pool? Are there any water chemistry or other issues I should watch out for?
Thanks in advance for any help!