calcium

Hey all, Im back again with a question. My facility is going on 60 years old with original tile flooring, it has aged poorly through its years and has a large buildup of calcium and rust stains. My initial thought was to acid wash with a 4:1 ratio but the results haven't been as good as i...

I THINK I have calcium nodules on the floor and icecicles on the walls, all over my colored pool plaster. I can't get a good photo of them so I borrowed a couple photos from Reddit that looks just like the spots and icecicles I have in my pool. They are white spots with brown around them, I'm...

Hi all. Trying to adopt the TFP method for my new pool this time around (instead of just whatever Leslie’s says). Plaster pool with PebbleTec , SWG. I’m scratching my head at the Pool Math app’s recommended Calcium Hardness. My builder suggested 200-300. Most posts in the forums are...

Hi all, I am a new user, hoping this is the correct spot for this post. I am new to pool ownership - we just moved into a house and have a 35-40 year old gunnite pool. I have noticed a large amount of "sand" in the filter of my Maytronics robot after every clean (pic attached). I do not believe...

I did a complete rebuild of my pool in June. Removed the old plaster, all the tile, and the coping, and replaced it with Mini Pebble, Glass Tile, and Stamped Concrete Coping. So it is only seven months old. I tested my fill water before filling: All tests done with Taylor K-2006 June 12, 2023 -...

Hey everyone, I'm looking for something digital that's accurate and can test as much as possible (mainly caring about free chlorine, total chlorine, ph, alkalinity, cyanuric acid, and calcium hardness). I have the hardest time with test strips and color matching. It's difficult knowing which...

I wanted to bump up my calcium by about 80 or 100 ppm. I did so late at night, several hours after topping off the chlorine to 6 ppm. In the morning the FC was essentially 0 ppm. I added enough liquid chlorine to bring it back up to 6 ppm, then a few hours later it was around 1 ppm. Finally...

30k gallon salt water pool, new vinyl liner installed 1 month ago. FC 4.5 CC 0 PH 7.6 TA 200 CH 325 CYA 35 Running my SWG at 50%, backwashed last night, Pool heater at 80 degrees. I’m having trouble with scale or calcium or maybe that’s the same thing, it is white, fine, gritty and cloudy when...

I’ve had a pool blanket on for a few weeks due to a solar panel that had large leak…. So I did not notice this stuff forming….. last year there were a few ….. now there are a few large communities. What is this stuff and what should I do to properly address it? Except for a tiny spot here snd...

Going through the forums I see a lot of Questions regarding cool owners that have very high calcium levels and people who struggle to get the calcium in line. Theoretically chemistry wise, adding soda ash to the pool should raise the pH locally enough which makes the pool cloudy and traverse in...

Hi all, I just had my liner replaced so all the water was delivered fresh yesterday. I checked readings prior to starting with the chems and got this: pH: 7.2 Free Chlorine: 0.1 TA: 250 (lotta limestone near here) Calcium: 318 CYA: 4 I have a 22k gal SWG pool with a vinyl liner. I hit it...

I’m thinking about increasing CH to 150, 175, or maybe even 200 to perhaps help the heater (see thread here) and also move CSI closer to 0.0 (even though pool is vinyl) Current tests: FC: 5 CC: 0 PH: 7.5 TA: 90 CH: 110 CYA: 55 (greater than 50, but less than 60 - may bump to 70 some day)...

Hi everyone, First time posting but long time follower. First of all I’d like to be clear that I am having our pool builder take a look at the plaster as it is only 8 months old. But I figured I would get some of your thoughts as well. Let me know what you think. Thanks!

Hi all, I have some new stains on the floor of the deep end of my pebble-tec pool. I thought they were created just because I waited a couple minutes before sweeping away the baking soda I had added before adding calcium chloride. But reading through other threads, I wonder now if I added the...

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...

I balance my water every Saturday and didn't notice this last week. I saw white calcium flakes on my pool steps this morning. Near one of the returns. I pulled one out, dropped muriatic acid on it, it fizzed and bubbled so I'm assuming it's calcium. I checked the water chemistry: ph: 7.8 Alk...

New pool owners here! TFP and the pool calculator have been amazing in helping us learn, but there’s one question we still have. We need to add calcium to our pool. 20k gallons plaster. Current level is at 210. We’re working on lowering our TA as well, current level is at 160 (we lowered PH to...

So I closed my pool myself (following TFP guidance!) last fall and opened it myself this spring. I used a standard closing kit in the fall and didn’t use any special chemicals this spring other than slamming it. it’s been hard this spring to get the water to clear. It’s been cloudy and I...

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...

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...

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...

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...

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...

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...

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!

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...

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...

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...

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...