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chem geek, Thank you for the reply, well that seems to settle why they possibly use zinc chloride. One quick question, for those of us who have high silica in our water over 50 ppm, such as the island of Oahu, the Central Valley of California, and many parts of Texas, would there be any...

chem geek, My apologies for wasting your time I should have more properly read the chemical notation for aluminum. However I did find these and they might explain why it is being used: https://www.lubrizol.com/DispersantsWaterTreatment/TechPapers/Use-of-Zinc-for-Corrosion-Control.pdf...

chem geek, The link below may solve the issue as to why Natural Chemistry is now using Zinc Chloride in their new formula for their Extra Strength Phosphate Remover, previously call Commercial Strength Phosphate Remover. It seems that Zinc Chloride mixed with Alum produces Aluminum Chloride...

chem geek, Thank you for the reply. Question: As Natural Chemistry's "PHOSfree Commercial Strength", new formula is now essentially a slightly stronger Phosphate remover, once the phosphates are gone and then controlled weekly by the Acrylic Acid Copolymer chemical, presently supplied by...

chem geek, Below are some links to Alum versus Poly Aluminum Chloride. It seems Alum can be substituted for Poly Aluminum Chloride. It seems that Alum is slightly less effective than Poly Aluminum Chloride in removing metals and silica but not by a great percentage. If the dose is increased...

Chem geek, Thank you for the quick reply. Well Zinc Chloride remains a mystery. Will the Baquacil oxidizer which have as you wrote metal chelating agents help to remove existing iron, and other metals during the HP/AA treatment? I will try and do some research on Alum versus Poly Aluminum...

JamesW, I am not sure if the word dissolve is appropriate, chem geek might describe it differently. But yes a larger amount than usual amount of Hydrogen Peroxide was used and did break up the silicate scale into a large sandy mess which was filtered out, backwashed out, and vacuumed out of...

chem geek, Thank you for answering JamesW's questions for me. You are far more capable and knowledgeable than I at explaining these processes, and it was a very clear answer. The only thing I do different from your explanation is to add the HP 2 hours prior to the AA. I am not sure if that...

chem geek, Thank you for the reply. Might this help regarding Zinc Chloride's purpose? http://www.zaclon.com/pdf/zinc_chloride_sol_and_solid_data.pdf

hdjii and chem geek, A few questions and then some observations, and finally a few more questions. Questions: It is sad to note that Natural Chemistry changed the formula for "PHOSfree Commercial Strength", it seems they also are changing the name to "PhosFree Extra Strength", as I doubt any...

Chemgeek, Thank you for the advice. And hdjii, Below is the Method I would now use if I were to repeat it. I did not cover phosphate testing but it is a good idea to do before the method and interesting after the second Phosfree removal at the end. Nor did I cover TDS but I will insert...

JasonLion, I think it is a matter of agreeing to disagree. My personal experience with both methods is different, a prior acid wash did not remove the scale some years back, but treatments with HP and AA did. The acid wash did mark up the walls however despite being done correctly, so...

hdjii, Thank you for your very complete reply. It appears from the linked two papers below, from the US Geological Survey, that you are possibly correct that Manatee County water may contain relatively high levels of both Silica, at around 40 to 60 ppm, and iron, but this varies well to well...

hdjii, Would be happy to help, with a brief as possible explanation of the treatment/method. Which might still be a little lengthy. It might take a few days before I can post it. In the meanwhile a few questions: 1. What chlorination method do you use, what is the size of your pump, and...

Chemgeek, Thank you for the quick reply and link to the paper. It was interesting to note in that paper link that they to came to the conclusion that the amount of copolymer to be used will vary with the iron, and other contaminant loads in the water. So 4 oz or 5 oz a week is really only a...

Chemgeek, An update: As of today it has been nearly 5 months since I first tried this treatment. The pool is now still completely free of any iron staining. Even dropping Vitamin C tablets onto the steps, and bottom of the pool, show no noticeable difference or improvement. Using Jack's...

Chemgeek, Update: As of today the increasing ppm of Calcium has finally stopped occurring. It seems to have settled at 400 ppm. Acrylic Acid Copolymer, seems from various papers to inhibit Silica scale formation, and remove Calcium scaling. Whatever little Calcium scaling was still present...

Chemgeek, Firstly an observation and update. It appears the polymer, Jack's Magenta Stuff (Acrylic Acid Copolymer), is lifting calcium from the pool surfaces. The reason I state this that since my post on December 6th where Calcium was around 350-360 ppm it has now risen to 400 ppm. Prior...

Chemgeek, An update, and success: It has been over 3 months now! Using the PHOSfree Commercial Strength, manufactured by "Natural Chemistry", coomonly known as a PAC (PolyAluminum Chloride), and the Jack's Magenta Stuff (Acrylic Acid Copolymer), continues to keep the pool from getting any...

chem geek, Thank you for the kind reply. It seems from your reply that you agree this method using Aluminum Chloride and an Acrylic Acid Copolymer does remove iron, both ferrous (Fe2+), and ferric Fe3+. (aka rust). Here is a very rough outline of what the process might look like. Please...

It seems it may be possible to greatly reduce iron in pool water. I look forward to Chemgeek's opinions. This is of course is extremely: Experimental : relating to a scientific experiment or to scientific experiments in general : made or done in order to see how well something works ...

chem geek, Thank you for incredibly fast reply it is much appreciated. I just got back from my older grandson's birthday party, too many kids in their pool. And my young grandson's soccer match, he is only six and the shortest guy on the team but fearless and very tough, he scored 2 goals...

chem geek, One other strange thing, the CyA keeps dropping. Last weekend it went from 50 some two weeks before to 40, last Sunday I added back to bring it back to 50, by Wednesday it was 50, but this morning it is 45. In other words it seems to be dropping too fast. I do the test the same...

chem geek, No news from Jack, or Palintest. Board of Water chemist did call me back about 2 hours after I called, so pleasantly surprised by the quick response. He stated they do use a small amount of Sodium Hypochlorite to sanitize water, but they do NOT use any sequestrant/phosphates. He...

chem geek. Thank you for your reply and clarification. No response from Jack yet, or Palintest, but it does now seem from what I have been reading today that the Board of Water can introduce legally other phosphates mixes into the water supply. Depending on the phosphate type, the percentage...

chem geek, I apologize if I gave the impression that HEDP gets reduced to orthophosphates quickly, what I meant to write is that some forms of Polyphosphates can be reduced more quickly, EDTA may be such an example, but not being a chemist I cannot verify this. I am aware that HEDP breaks down...

chem geek, I am going to have to make this a quick reply as I am very busy this afternoon and evening. If I do a orthophosphate test on tap water with a pool kit, I get around 400 ppm orthophosphates. If I do a orthophosphate test on pool water with a pool kit (1:5), and an aquarium test kit...

chem geek, Thank you for the reply did you read my latest post. You were right. Aloha.

chem geek, To use the expression from "Alice in Wonderland", "curiouser and curiouser", something strange has happened to our municipal feed water. I will explain below. Jack's Magic tech called me back, within 2 hours he was travelling and on his mobile - great service, he stated he spoke...

chem geek, Once again thank you for the quick and clear reply. Some answers for you: 1. No I did not add any additional sequestrant since the initial amount of 40 ppm added six weeks ago. Please note that Jack actually recommends 20 ppm for heavy iron issues. If I did not have a...