cya

I have a Taylor K-2006 test kit that I got October 2022. When I tested my CYA according to their instruction I was getting a 35 (yesterday) but I just went to test at Leslie's today and the computer says my CYA is 59. Is there a common mistake I might be making when I do my own testing? Which...

I am writing this as a record of my steps in dealing with a situation I'm sure many of my neighbors in Texas are dealing with. In central Texas, the pecan trees are occasionally infested with aphids in late summer. The aphids will suck sap from the underside of the leaves. The sap is under so...

We just had our SWG start up last week for my 10,000 gallon pool. The pool builder company came and added salt. I just did my first salt test (Taylor TF-100 salt kit) and it’s showing 4400ppm. Too high I know, but is it dangerously high? Will this go down over time? Here are my readings: Ph 7.6...

Hi all. I have been a paid subscriber to the Pool Math app for a few years now. I've noticed it seems to underestimate the effect of adding dry stabilizer. For all other products such as 10.5% sodium hypochlorite, and 31.45% HCl, the calculations seem pretty accurate, but whenever I add dry...

I’m delighted with my SWG for many reasons. Among them the idea that I can maintain reasonably low chlorine levels while keeping CYA a bit higher. Many thanks to all the contributors on the topic of CYA & Chlorine relationship – including Ben Powell. Richard Falk (chem geek) and other forum...

I live in Las Vegas, NV and have a 20,000 gal pool and I use Liquid Chlorine . Earlier this year I bought some granular cya and raised it to just 30 but I think overtime is has gone just a bit below. I have seen on some posts its not bad to have a bit higher cya for some areas. I want to raise...

I am ready to get off the Leslie merry-go-round and move to the TFP philosophy. Walmart has pool chlorine for $5 a gallon. I plan to buy them out. I am fighting CYA problems. I drained half the water last week and that got CYA down to 100. I tested this morning and it is considerably higher than...

After having a small 7,000-gallon fiberglass in-ground pool for a year and being sold a bill of (expensive) goods by Leslie's when I first opened the pool, I am still left with SUCH frustration over ONE thing: cyanuric acid! I've had to partially drain/refill my pool three times already due to...

I'm new to pool maintenance, and we recently set up our 16x32 foot pool with a SWG. I've heard of some people that were able to forego using CYA with an SWG if they kept a pool covered on a regular basis. I've tried this method - I do run the SWG a bit more than would be necessary if adding CYA...

Purchased house with my first ever pool. SWG 30,000 gallons. CYA reading at 7ppm from one store, 5 at another, and 0 on a test strip. Poolmath says to add 18lbs, TFP says to do it through a sock at the returns. Do I just add another (3) socks full everyday for a week to get it up assuming each...

Hey ya’ll. Newbie here who has done a massive amount of research on the forums trying to get it all right. I’ve run into a few pool builder challenges that threw my chems out of whack just when I almost had them perfect! First off, I live in hot, dry Arizona and have a 10,000 gallon salt water...

I’ve seen it recommended to keep FC under 2.5 to maximize the life of a solar cover. Is that as true when CYA is 50? I’ve seen on TFP that with a CYA level of 50 I should not go below a FC of 3.75ppm (7.5% of cya). And I’ve seen on TFP that for swimming in a pool with cya of 50 that it is ok...

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...

Hi there! We just patched up a leak and need to add a little CYA. (1 ounce) How long do we need to wait to swim after adding it to our skimmer?

We just opened our ag pool up and it was sparkling clean! From what I can tell, our numbers seem to be alright but the CYA is low. What are some recommendations for raising it to about 50? Our pool is in direct sunlight so the chlorine takes a beating. Should we put the solar cover on it until...

How are pool service guys keeping the CYA down while using Trichlor tablets on non-SWG pools only visiting 1 time a week?

I bought this house with a pool a year ago (Tucson, AZ) and I'm completely over my head in maintaining it. I bought a Taylor Test Kit (had seen it recommended on here) and noticed my CYA is way high. Last time I checked, it was over 100. Should I do a partial drain to get it back to where it...

Does a 200 ppm CYA level invite Black Algae? Seems like I can't keep a high enough chlorine level with this high of a CYA. Black Algae is mostly on the walls with some now spreading down the deep-end walls and a just little on the bottom. To find the 200 ppm CYA value, I used the Pentair Rainbow...

Hi all. I am building a pool and so I am starting to research how to maintain it myself. What I have read about pool chemistry all makes sense to me except for the following question I have... I understand that CYA is a chlorine stabilizer that you need for an outdoor pool. I also understand...

Hi! Fresh fill of 1,300 gallons + 400 gallons of clear water that was in the winterized pool. I've just added 6 oz of CYA to my 1,700 gallon pool. I've used my pool brush to dissolve it. How long do I wait to add chlorine? When can I turn on the salt water generator? How long until CYA...

I’m getting control of my pool water with the TFP method. Slowly but surely my numbers are getting in line. Anyway, my CYA isn’t outrageous but it’s higher than it should be. I’ve been following Pool Math App for keeping FC in the right range. Ultimately that’s meant my FC is higher now than...

My regular supplier was out of dry stabilizer so I picked up a couple of bags of Splash Conditioner for Stabilizing Chlorine. There is no where on the package that says if it’s 100% Cyanuric Acid. Does anyone know or have experience with this? My salt pool is always perfect thanks to TFP and I...

For the past year or so, I've done sanitation and shock in my 500 gallon tub with Bromine and MPS mixes. I've recently shifted from MPS to a dichlor-based shock. Since my shocks are typically no more frequent than weekly, should I have any concern of CYA buildup? I don't do any CYA testing...

First year pool owner. I’ve been following the pool stores directions on how to care for my pool. The pool store is also the same company that put the pool in for full disclosure. My pool is now completely green. They keep selling me I’ll decide to pour into it and telling me to turn my...

Approximately 6 weeks ago I added CYA to my pool. I am not sure exactly how I did so, but I put to much CYA in the pool. Now the walls of the pool turn green about every 10 days, to the chagrin of my wife and grandchildren. I am sure the high CYA is hurting the effectiveness of the Chlorine...

Hi all! Happy to be here and posting. I've been reading pool school and all resources for the past few weeks and am hoping I'm on the right path, though I believe the only answer at this point is to drain and replace. I am trying to avoid right now. We did accidentally drain and replace about...

First and foremost thank you to every contributor on this site. I’ve mined the old threads here and my pool is transformed! A piece of advice I see sometimes is “keep the chlorine at 20% of CYA” and I want to be sure that I am 1. Calculating that correctly and 2. That my pool qualifies for this...

I'm in my second summer as a pool owner after purchasing a house last summer. I towed the same line as the previous owner and used Clorox Xtra Blue tabs and used basic testing strips. I didn't notice significant issues last year, but also wasn't looking as closely. This year startup went well...

I can’t keep the CYA level up enough to keep the chlorine from getting eaten up by the sun. Has anyone else ever had problems keeping it up? What makes it go away? I am not backwashing much or draining and filling the pool. The guys at Leslies are perplexed but just want to sell me more CYA...

Hi All, My pool is 17,415 gallons. 11 days ago my CYA was 42. Today I tested (at the store; I’m ordering my own test kit today) and it was 54. I’ve done a backwash, added water AND only added two Trichlor tablets in those 11 days. Can two Trichlor pucks add that much CYA in 11 days? Seems...