calcium hardness

Third year pool owner in Phoenix, AZ. Pool specifics are: 10,846 gallons Pebble-Sheen SWG Pentair IntelliChlor IC40 Typical pool chemistry: FC 3-7, pH 7.9 to 8.5, TA 70, CH 150-1000 (see chart for 2023 test results), CYA 50, Salt 3400 *Fill water is pH 8.5, TA 100, CH 100 Looking for...

Our pool/spa store is closed for the week due to the holiday and I’m out of calcium hardness increaser. I have some HTH Calcium Up for my pool. Can I use that in my hot tub?

Has anyone tried controlling a 4:1 CH/TA ratio? The attached article describes how a 4:1 CH/TA aids in “containing” ph (effectively reducing ph fluctuations). https://blog.orendatech.com/the-ideal-calcium-to-alkalinity-ratio I am currently reducing my CYA (target is below 50) and should be...

I have a vinyl liner pool and it has been raining in the north east on and off for days and will continue to do so. I need to add calcium. Can I do this while it is raining? This morning: FC 3.2 Alkalinity 70 Ph 7.4 (will keep rising due to rain I’m sure) Calcium 180 CYA 50 Salt 3000 About 23k...

25K gallon, in-ground, vinyl pool Opened last Saturday 6/10 Shallow side I can see the bottom, but it is very obscured Deep side I can't even begin to make out the drain Water is otherwise clear/blue Tests: Taylor K-2006 (T) at 7:30am today Pool store test (PS) at 10:30am today FC: T: 12.5...

Hi there. This is my 3rd summer with our plaster pool. 32700 gal. I didn't do as well keeping up with the pool year 2 as I did year 1 so I hired a pool guy over the winter. Now he is proving to be unreliable and I have to switch. In the meantime, the salt cell needs cleaned and the pool...

I'm opening up my pool for the season, and I have all my levels set, except for my calcium hardness. Current CH reading is 180. I've read varying theories on how important this level is. I have a SWG, fiberglass pool (Corinthian 14 - Latham Pool) and an electric heater. PoolMath is telling...

Had pool resurfaced with a pebble finish on 11/1/2022 and builder did initial startup. I took over maint and chem balancing from the PB on 11/6/2022. Per TFP forum recommendations I followed NPC startup guidance processes. On 11/27/2022 started using a Taylor K2006-C test kit and tested CH to...

Hello TFP folks, I recently had my pool plastered with NPT's Stone scape. On the first day the pool was filled up I started water treatment. Based on my taylor's test kit results, I started by adding a good amount of muratic acid since the PH was really high. I didn't have any Alkalinity...

I just installed a SWG about 2 months ago and I'm still getting used to the variations in chemistry balance. My numbers look generally in range, but the final CSI result is strongly negative (about -0.66 this last week). That seems bad to me. How bad is that? Tested just now: FC = 6.5 pH = 7.5...

On our initial fill about 6 months ago we didn't purge first or wipe down the waterline. With ~30 ppm cya we targeted 6-6.5 chl if getting in, 5 if not, twice a day. Demand ate about 1-1.5 if we didn't get in. I figured the ozone generator was mostly responsible. Within 2-3 months we got foam...

Hi all, I'm a new pool owner in California. As I learned so much from the community here, I wanted to give back, by registering to the forum and sharing my experience after the first couple of months. The main challenge I faced was high Calcium Hardness (1000+ppm) in my plaster outdoor pool...

Hi. We've had a lot of sudden rain the last few days, after a summer of almost no rain (which is unheard of here in FL in the summer) and while all my other chemicals are balance (thanks TFP and the TFP test kit!)- my calcium hardness went from 350 to 300 over a week. I don't know if it's...

Newish pool owner here, recently went through my first SLAM (clorine dropped due to SWG issue and I didn't catch it). I had been a bit lax in testing and things got away from me. I'm now being more diligent about testing, possibly bordering on OCD behavior. (I live in North Texas and up until...

We have a new pool that is not yet "officially" done as the installers need to come back and add salt and program the control panel. We have been told that it is still swimmable while the plaster finishes its curing process so In the meantime we have been maintaining Chlorine manually. That has...

Over the past couple of months, yellowish stains have been popping up and they are increasing and getting darker. They don't scrub off. I've been told a few things: 1. Possible rebar rusting. I don't think this is the case. The pool is less than 1 year old. 2. Salt creates stains faster...

I have previously drained and refilled my pool to get my CYA levels which were off the charts(300+), under control. My area has hard water, and after refilling the pool my CH was very high (625). I was wondering if I could take my sump pump and connect it to something like this and run it for a...

Has anyone had issues with squeezing drops out of R-011L? For the past several months it's been harder and harder to squeeze drops out and finally today, no drops. My bottle is .75 and not expired. Just wanted see if anyone has encountered this.

In searching for Calcium Hardness solutions, I was unable to find a 100% 50lb calcium chloride product, but I found this today. 50 LB pail from GoVets.com 90-92% pure. There is also a 50 LB bag, so I figured I'd buy the bucket, then refill it with bags. Seems to be a good price ($49 pail/$38...

My CH is 275, which is on the low end of the recommended range for a plaster pool. I have softened fill water, so it's not going to rise on it's own, it's actually fallen slightly since the beginning of this season. Two questions: Is this CH level range ok in the long run? How low is 'too...

I’ve been trying to maintain my pool for the past few weeks now. Just wondering if I should add Calcium to my pool or to just leave it alone since I’m on the low side and expect it to rise over time. My CH was sitting at 500 when I bought the house. Did a drain and refill a few weeks ago to...

Hi Everyone, 1st post here so go easy .... :) I did already search the forums and found a lot of varying information. I have a 13k gal SW pool and the Taylor test kit that includes salt water testing. I'm fine with all the tests, and have everything in normal, except for my CH is 250, and...

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...

I see a lot of posts and recommendations on here that say CH levels do not matter in vinyl liner pools. I understand that it will not affect the liner itself. I am curious though about the effects of a low saturation index on pool heater exchangers and cement pool decks. Many other sites...

Just had my pool resurfaced. For the first two weeks, I relied on Leslie's and another local pool store for pool tests until I got my TF-100. Did my first test today. I've got a SWG (Autopilot) FC=17 CC=2 PH=7.5 CH=600 TA=80 CYA=30 The Leslie's results were very, very close to the TF-100...

Dear experts, I have a fairly new 5600 gal plaster spool with IC20 SCG. I recently purchased TF-100 kit to manage my own water and here are my numbers: Free chlorine: 4 ppm Total chlorine: 5 ppm Calcium hardness: 700 ppm (tested fill water supply and it is 50 ppm) TA: 130 CYA: 60 Salt: 4000 pH...

Marty Question for you sir if you wouldn't mind. So CH is gradually decreasing ever since I converted to soft water (nearly a year ago). So far, so good. Just what I wanted to happen. However, my CH is now at 400ppm and there is no doubt that it will continue it's downward trend over time. With...