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Maxemily

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Spa Savant

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  1. $$$$$$$$$$ Exactly! There is little margin in a gallon of bleach.
  2. My experience with muratic acid and my 325 gal. tub tells me .4 oz will not do enough for you in the long run. Your PH might initially drop to 7.6, but it will climb again in short order. A better approach might be to drop TA in increments and see where PH stabilizes. If you look at the bottom of the Pool Calculator page you will find an 'Effects of adding chemicals' paragraph. This app. contradicts the calculator section somewhat in that it shows a .57 drop in PH with 1 oz of muratic acid added to your tub. The TA drop looks accurate for you and that is where I would focus, if I were you. Add the oz., check TA to confirm drop accuracy, then check PH and PH again tomorrow. Keep this pattern up until your PH stays where you want it. For what it's worth, my tub likes: TA 60, CH 200, CYA 25, Borates 50, Temp 100. This gives me a saturation index of -0.14 but keeps my PH rock solid at 7.6
  3. Refilled the 325 gallon tub at the end of August and had 30ppm CYA in short order as we use the tub everyday. Water temp in September averaged 95F, in October 97F. I add 3oz Clorox per day. The CYA test is now clear. Glad you brought this up.
  4. Is there a 'norm' for the filter cycle? My controller allows one, two, or three cycles for one, two, or three hours per twenty-four hour period.
  5. So, there will never be CC to address? If there is CC how would it be corrected?
  6. No personal hot tub reason other than I am going to change the water soon and thought I might shock the hell out of it, wait till the FC level won't kill the lawn, then drain and fill. You know, just in case.
  7. Does anyone know if cranking up the FC will break down biofilms? And if so, to what level of FC is necessary?
  8. Had that happen once to us after using Sea Klear. That is not to bad mother Sea Klear, I use it regularly with confidence, I feel it was an anomaly, but I digress. I used a plastic scraper to get as much goo out as possible then wiped up the remainder with a cleaner safe for spas (brand name escapes me). I let time finish the clean up. The spa seemed to fix itself after my half-baked clean up. Nitro, your advice in this forum is excellent and you are likely better suited than I to answer this question, but your post is missing the solution to Jim's question.
  9. Stats: FC 2 PH 8 TA 80 CH 160 CYA 70 Borates an estimated 50 Temp 100 Pool Calculator 0.03 Is the PH of 8 a concern? Draining half the water would get the CYA correct, but I don't want to. Is there a compelling reason I should? There are no - and I mean no - issues with water quality, clarity, odor, FC drop, misc. build up, etc. The water is due for a change in two months.
  10. Where were you yesterday! "...where did you find the blurb about 16 ounces of hydrogen peroxide removing 10 ppm FC?" Yeah, about that... the aforementioned whiskey might have played a role in my putting two entirely different paragraph together into what I wanted to read. Yes, it is 3%. Your basic drugstore variety. "...in 350 gallons, neutralizing 10 ppm FC requires around 7.1 fluid ounces of 3% hydrogen peroxide." That would be very close to what I experienced. Thanks for taking the time to sort through the math.
  11. Hydrogen peroxide that is. I will spare you the whiskey induced excessive chlorine level story in my 325 gallon spa except to say the FC was 14 after 24 hours. I looked around this forum and found a blurb about hydrogen peroxide, lowering chlorine, 16 oz, and 10 FC drop. That was all I the persuasion I needed. I poured the 16 oz in the tub and poof! no FC. So, I added Clorox and added Clorox and added Clorox - no FC. Turns out it took 10 additional ounces of bleach to get back to an FC of 2. If memory serves, the 16 ounces of H2O2 offset 20 ounces of Clorox. Time to go relax in my experiment. I'll let you know if I have any skin left.
  12. Thanks Dave. That is pretty much how I have been adding everything except muriatic acid. I am more comfortable pouring acid into the large, open area vs. spilling on the edge of the tub.
  13. Thanks for the info. I guess there is no need to take a chance in ruining spa parts. It's easy enough to dilute and pour slowly.
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