Convert indoor Baquacil pool to salt water chlorination?

[PoolDoc]

IMPORTANT:
If you are reading this, and are NOT the original poster, you need to know that this applies to an INDOOR CONCRETE pool. While this could be readily adapted to an outdoor pool, there are several cautions to be observed.
+ FIRST, only concrete pools in DRY ground can safely be drained. Other pools -- especially vinyl pools -- require special methods, tools, or precautions.
+ SECOND, we don't recommend PHMB water treatment. If it works for you, that's fine, but it's expensive, more complicated than advertised, and is NOT a full spectrum sanitizer, because it is ineffective against viruses..
+ THIRD, Baquacil CDX complicates things in ways we don't understand. It contains DHM, dimethyl hydantoin, a chemical first used in pools as the basis of bromine tablets. It has a history of causing problems in pools, beyond the problems PHMB (Baquacil) already has.

The approach below uses everything possible to create an inhospitable environment for water mold while avoiding chemicals that make things unpleasant for people. BUT it is NOT a magic bullet. Once you've had water mold, you must remain vigilant to make sure you don't get it again. Water mold / white mold is an out-of-control biofilm, and these are notoriously hard to eradicate. Doing so requires making sure the needed PHYSICAL cleaning is taking place, by brushing, vacuuming, and filter maintenance, as well as maintaining higher than normal chemical levels (60+ ppm of peroxide, PHMB, and borates), AND replacing the standard algaecide with polyquat (aka Baquacil Performance Algaecide).

1. Drain 100% of your pool (if the ground is dry enough so there's no risk of 'floating' the pool!)
   
   
2. Replace your sand.
   
   
3. Backflush your lines into the pool, by running water into your filter or pump. Brush, spray, clean, rinse everything you can and re-drain remnants. Pour 1:3 mix of 6% bleach + water into skimmer, pump, filter (after replacing sand!), pipes, and main drain. If you have a light, take it out, and clean behind light. Allow bleach to stand overnight. Re-rinse & redrain.
   
   
4. Order
   + a bottle of Softswim 4-Way Test Strips @ Amazon
   + Taylor K-2005 Complete Test Kit - High Range @ Amazon (not our normal K-2006)
   + bottle of Lamotte Insta Test Borate test strips (NOT @ Amazon)
   
   
5. Order or purchase
   + (4) quarts of polyquat algaecide ( = Baquacil Performance Algicide) [ 7 ppm per quart ]

   Kem-Tek 60% polyquat @ Amazon
   Nava 60% polyquat @ Amazon

   + (2) lbs of EDTA stain / scale control ( = Baquacil Metal Control) @ Amazon
   
   + (12) gallons of 27% peroxide ( = Baquacil Oxidizer) [ 10 ppm per gallon ] @ Amazon Splashes / Aqua-Silk
   
   + (1) lb sodium thiosulfate ( = Baquacil Chlorine Neutralizer) @ Amazon
   
   + (25) boxes of 20 Mule Team Borax ( = Bioguard Optimizer) [ 2.6 ppm borates per box ] @ Walmart
   
   + (8) gallons of muriatic acid @ Lowes
   
   + (25) lbs of calcium chloride (unless you KNOW your fill water is 'hard') @ Amazon
   
   + (1) CuLator @ Amazon
   The CuLator product is a special patented plastic material, contained in a bag that goes into the skimmer, that can slowly take metals OUT of your pool water. We think it works, and have some evidence that it does, but not proof yet. (Not likely to be available locally.)

   1 ppm Culator @ Amazon
   1.5 ppm Culator sold by Amazon, shipped from Periodic
   4 ppm Culator sold by Amazon, shipped from Periodic
   Poolmaster 16242 Poolmaster Skimmer Basket Liner @ Amazon (to protect CuLator from being damaged by scum)

   + (10) gallons of 20% PHMB santizer ( = Baquacil or Softswim 'B') Splashes 4 gal / Aqua-Silk 1 gal / Softswim 2 gal [ 8 ppm per gallon ]
   
   
6. Add 6 ppm polyquat (3/4 quart) once pool is 1/8 full
   
   
7. Add 1 lb of sodium thiosulfate at 1/4 full.
   
   
8. Use muriatic acid as needed to hold pH to near 7.0, while filling.
   
   
9. Add borax as needed to keep pH above 6.8 (1/2 box doses)
   
   
10. Add 2 gallons of 27% peroxide at 1/4 full, and every 1/4 after (8 gallons total - 80 ppm)
    
    
11. Add 1 pound EDTA @ 1/2 full.
    
    
12. Begin circulating pool as soon as you can start pump (Operate pump 24/7).
    
    
13. Add 8 gallons of PHMB (64 ppm) once pump is running.
    
    
14. Add 2 gallons of muriatic acid to the POOL.
15. Immediately add 3 boxes of borax to your skimmers (SLOWLY, pump running).
    
    
16. Wait 2 hours, then test pH - add 1 box of borax if pH is below 6.8; add 1/2 gallon of acid if pH is above 7.4.
    
17. Repeat # 12, 13, & 14 till 22 boxes of borax have been added.
    
    
18. Adjust pH to near 7.2.
    
    
19. Put skimmer sock and CuLator in skimmer.
    
    
20. Brush, vacuum pool. Wait 24 hours. Backwash.
    
    
21. Keep pool at ~60+ PHMB & peroxide for at least 2 weeks. Check every 2 - 3 days.
    
    
22. Dose with 1/2 quart of polyquat 2x per week.
    
    
23. After 1 week, if there is no sign of water mold, begin adjusting calcium level

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