I have an old pool 13,000 gal above ground that I inherited with the house we bought. It has been stagnant for over a year, but we plan to use it this year.
Some features about the pool:
It has a Hayward Sand filter, no heater, and I purchased an inline chlorinator which I plan to use 3" triclor tabs in.
The water is very green and I think a family of frogs have claimed it home. I will be using a sub-pump to attempt to pump out most of the muck from the bottom while putting fresh water in from the top (so the pool never drains, since this is bad).
I have done alot of reading, so much that I'm completely confused now with what I actually need to do once the water has been flushed, vacuumed, and clear again.
What I do know is that I need to:
1. Stabilize PH
2. Stabilize the Alkalinity
3. Add around 30ppm CYA (the tablets will raise to the proper levels within a month or two)
My questions are:
1. Do I need to shock the pool to bring up the FC right away or will the tablets do this on their own?
2. I want to try and avoid weekly shocking. I want to believe that this is a marketing tactic just to sell more. So my thoughts on this are, use the tablets until the CYA is higher and do a backwash on the sand filter and refill. This should lower the amount of CYA in the pool back to normal ranges. Recheck the PH / Alk and go on with my life. Am I correct with this logic?
3. What are others doing so they don't need to shock?
The use of household bleach is not an option since we will have younger children swimming. There are other chems in household bleach that are toxic.
Thanks for the help.