JasonLion,
I spoke again early this morning and then later with Jack's Tech, who actually relayed the information as I was on the phone to Jack himself. The upshot was as follows.
Copper: I explained that for 6 years 1994 to 2000, I had a Nature 2 and not knowing anything about pools maintained my pH at around the recommended ppms that were commonly put out by the pool shops, pH 7.6-7.8, Alkalinity 80, Hardness about 300-400, CyA of 30-35, and because of the Nature 2, FC at around 2-3, I had no salt generator, nor pool cover at this time. I felt therefore that I might have copper staining. They to thought that there was a high probability of copper staining.
Iron: I explained our "Trade Winds" that blow near constantly at 16 to 24 mph with gusts up to 40 mph, where I live, on a mountain at an elevation of about 1000 ft, the mountain is 2400+ ft. I explained what we call "Red Dirt" here in Hawaii settling finely on the pool daily where we live due to these winds, and because new construction has been occurring above our home exposing the "Red Dirt" soil from 1994 to 2006. The house had to be re-painted after 10 years, despite my washing it down with a hose, nearly every Sunday. For interests sake I discovered that not only does it contain large amounts of iron, but I am told also copper, and manganese, but not nearly as much as the iron. Also behind our mountain facing north is one of the island of Oahu's primary agricultural areas, the soil is often exposed and blows up and over the mountain.
The neighbor above us actually sued and won a court case concerning the discoloration and contamination of his pool due to lack of screening by a contractor. I did not participate in the litigation. The "Red Dirt" still settles daily but due to the lack of construction it is nowhere near as bad as prior to 2006. This is why I had to treat with Ascorbic Acid (AA) treatment, at least once a year, once I found out from a web site similar to yours that there was a way to remove the brown tinge from the pool. It still returns, and the stains re-occur. I did use sequestrant but it was not Jack's Magic stuff, or Proteams, unfortunately they were not as effective as those two so the stains finally came back, albeit slower. Jack's Tech team concurred there was near certain probability that I had iron staining.
Organic Stains: Because of the trade winds blowing soil dust over the over the mountain from a northerly to southerly direction, we being located in the southerly direction, there is a high probability that this dust contained organic material, which contains iron as well, especially in tannin. Add to this that we had a large tree, that dropped small leaves daily, only a few feet away from the pool and the fact that I was working so many hours that I only had one, sometimes two days a week to give the pool a proper check at that time, this to contributed to organic material settling onto the gunite. Jack's Tech concurred that that to most probably meant that we had organic Stains.
Scale: As regards this I know I had scale because I drained the pool nearly every 12 months and could see it clearly, but was loath to acid wash it again, due to the potential damage everyone writes about. I think I did wash it, rather poorly in 2004. Based on what I explained to Jack's Tech they to thought there was scale especially as it was visible when drained.
I did ask Jack's Tech if this situation where all four factors occurred at once happened often. The reply was no, but it did occur 10% of the time, in their experience.
I informed them that the treatment seemed to have run its course, and that no further improvement seemed to be occurring. The Tech consulted with Jack while I was on the phone, I could hear them discussing the issue of the minor stains. They suggested the following final treatment that should solve the issue. The suggestion was to add 5 lbs of "O2 Safe Shock", leave for 20 minutes, then add 3 gallons of Muriatic acid (yes 3 gallons that was not a typo), then bring the sequestrant up to shock levels of 18-20 ppm. Leave this in the pool for 48 hours with pump running continuously. They stated the "O2 Safe Shock" would further oxidize the stains raising them to near the surface where they could more easily be removed by the sequestrant working in conjunction with a very low pH.
Well I will have to wait 2 days to see if it works.
I must say I was rather surprised by your reply of "nil", my business deals in probability and the word "nil" or a definitive "zero probability" sends tingles down my and my partners spines when mentioned, as we are aware that one of the lowest probabilities is 3 "Standard Deviations" and this occurs only 2.1% of the time, in most cases We use these numbers to guide our clients in to making the correct choices, the higher the probability, one "Standard Deviation" the greater the likelihood of success, but also the return on invested capital is not normally above the norm. The greater the "Standard Deviation", 2 or 3, the less probable but with greater chances of loss or gain.
We keep ourselves in check by having in our notebooks two quotes that constantly remind us of being tempted by the propositions made to us of zero probability of something occurring. The first is from Mark Twain, "It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so.†And the other by Voltaire, "Doubt is not a pleasant condition, but certainty is absurd." By constantly being reminded to avoid these temptations, we have managed to avoid overly large losses, and/or risks for our clients. But to be honest about it we to have been often tempted to the probability of zero, but then we deal in probabilities daily so know better after all these years. The 10% chance of the pool having all these conditions met lies within statistical probability albeit at a rarer 2 "Standard Deviations."
I think my own personal mistake was not to have gotten Jack's Test Kit first, and then I would know for sure that all four conditions were met even though Jack's Tech thinks so. It is quite possible you are correct that one of the conditions, possibly two, did not exist. But as the saying goes "All's well that ends well", for this I thank you for getting me to really thoroughly think this through, and to not be so "certain" about my own conjectures, also to force me follow the expert Jack's advice, certainly I would never have added 3 gallons of acid unless I heard it straight from the "Horse's Mouth". So please forgive me my arrogance, I deserved to fall.
As no person has yet answered my questions I will answer them below as best I can with the help of Jack's Tech for those that may be interested.
Question: Jack's Tech Support suggested that if I plan to drain the pool, that I rebalance the water when filled, but prior to adding chlorine or salt, I should add 5 lbs of their O2 Non-Chlorine shock and wait 30 minutes, skimming of any dirt that floats to the service. As Jack's Magic contains sulfates would it not be better to add this prior to draining the pool?
Answer: The Jack’s Tech stated that their O2 Safe Shock will work fine with salt and chlorine. Added to pool prior to drain. Forgot to ask if it adds sulfates.
Question: Will the chlorine shock I am planning on doing tonight help the organic/tannin stain issue?
Answer: From my observation it will not make much of a difference, but did eat up some sequestrant
Question: Is the Non-Organic shock better for organic/tannin stains than a chlorine shock?
Answer: Jack’s Tech stated O2 Safe Shock, will work much faster than chlorine at oxidizing and lifting stains to the surface where they can be removed by the sequestrant and presumably the low pH created by adding 3 gallons of muriatic acid in my 10,000 gallon pool.
Question: Will chlorine and salt in the pool interfere with non-chlorine shock?
Answer: Jack’s Tech stated no.
Question: If non-chlorine shock is used would I need to add a lot of chlorine after its use?
Answer: I forgot to ask but will check later.
Question: Would the 3M drill attachment be less invasive than an acid wash?
Answer: May not have to use it after this final treatment but will advise if I do.