calcium

  1. D

    Calcium high after water softener refill??

    Hi all, my calcium levels were off the charts high, so I drained my fiberglass pool about 60% and replaced it with water directly from a full house water softener. When doing a test of the home water (by itself) all levels are normal; the calcium is about 200. but after refilling the pool, the...
  2. D

    New pool questions

    I just bought a house that has a pool that’s about a year old. 1. The Calcium Hardness is about 650 and the water used to fill the pool has a CH of 150. I drained a large amount of water due to rain and it didn’t drop the CH levels. Could the CH levels be related to leaching from the pool...
  3. S

    Calcium hypochlorite & doser

    Not sure if this is the right place to ask this question, but I was wondering if someone could comment on: - is there any issue with using calcium hypochlorite on a daily basis as a pool sanitizer? - and if it is ok, has there been any attempts to build an automated doser for calcium...
  4. R

    Understanding what to change

    All, Thanks for the excellent advice on my previous post and the advice to not trust Leslie's! After getting my TF test and getting comfortable with it (testing daily to get a baseline), here is where I'm at: FC 3 PH 7.5 TA 80 CH 300 CYA 40 I recently several nights ago dropped by PH down...
  5. R

    AGP and Calcium Hardness

    I read a post from more than 60 days ago that said a vinyl pool doesn't require Calcium. You just need to check it from time to time to ensure your levels aren't too high. I am new to the Pool Math app... but on a positive note - I just switched from Pristine Blue to exclusively the TFP...
  6. M

    Dust/calcium at bottom of pool

    Hello. New here. I am consistently having this dust looking stuff at the bottom of my pool after the water settles. I thought it was just our hard water ch(225) I vacuum to wasteland.the.time and it just keeps coming back. We do live next to a gravel road so I’m beginning to wonder if it’s...
  7. Q

    Ozone system pool water

    Hi, we just installed a new ozone pool system using chlorine as a secondary sanitizer. Instructions are to check chlorine, pH and alkalinity levels but do I need to balance the calcium and cyanuric acid levels too? Can't find anything online or in the manual about this. Thank you for your help!
  8. J

    Calcium chloride vs calcium carbonate to raise CH in SWG chlorinated pool

    I recently saw a video arguing against adding calcium chloride to a pool that is SWG chlorinated. Does anyone have any input on that? The argument was that in a salt water pool the calcium chloride will leach out on the cell plates. And that a lower level of CH (100ppm) can be maintained...
  9. D

    Pea sized black spot

    Hello Fellow Pool Boys and Girls, We just finished building our pool about a month ago. Unfortunately, we've developed a pea sized spot with a black center and brownish cloud moving away from the center. I tried placing a chlorine tab on the spot, for approximately a week, and brushed...
  10. Chemingway4

    New to TFP (Kind of) Question about CH after Pool Refill (pool store didn't want to sale me anything!) and daily Chlorine loss

    I recently drained and filled my pool (3 weeks ago). The CH reading is 80ppm. I know that's low, but when I went to the pool store to get supplies, I was told not to worry about the CH as it would slowly rise over time. I thought it was odd that they didn't want to sale me anything, so I left...
  11. R

    Calcium hardness and salinity for salt water pool

    Hello all, I’m new here to the site but not to pools. Grew up with a chlorine above ground pool, bought a house 5 years ago with a 25,000 gallon in ground pool that I converted to salt a couple years ago. Today I had to add 25 pounds of calcium chloride to increase my calcium hardness. Since...