Never thought I’d have this thought considering how high my cya was getting before I stopped using chlorine pucks, found this site, and started avoiding pool supply stores. But I’ve read several threads in here about low CYA levels and what to add, etc. I’m curious, if you’re using liquid chlorine and have too low CYA, why would you not just throw a few chlorine pucks in until it goes back up? Is it not as cost effective or is there other stuff in there you’re trying to avoid? Just curious
Curiosity on low cya
- Thread starter Bobfrapples
- Start date
- Jun 24, 2021
- 13,438
- Pool Size
- 29000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
Pucks are fine to raise CYA. Haven't run the numbers, but likely cheaper just to buy dry chlorine stabilizer.
It's ironic that pucks quickly get out of hand when used frequently, but day to day they are slow to raise the CYA.
If you are particularly low, you'll want to use granuals so you don't have to babysit it while the pucks add one or 2 ppm CYA at a time.
If you're looking for a small boost, say, from 40 to 50 expecting the insanse TX UV to ramp up soon, then you still have enough CYA in there in the short term and pucks are an ok source.
But if you don't have a large tub of them (or leftovers), they're $8+ each at Walmart and crazy expensive.
If you are particularly low, you'll want to use granuals so you don't have to babysit it while the pucks add one or 2 ppm CYA at a time.
If you're looking for a small boost, say, from 40 to 50 expecting the insanse TX UV to ramp up soon, then you still have enough CYA in there in the short term and pucks are an ok source.
But if you don't have a large tub of them (or leftovers), they're $8+ each at Walmart and crazy expensive.
I am about at the point where simplicity is more important to me than the cost. With all of the rain we've gotten this spring/summer and heat degradation, I have had to add CYA multiple times recently. I am going to essentially do what you are asking about bob and start with 3/month for now and adjust up or down as the seasons change and depending on what testing shows similar to how I adjust the SWG throughout the year.
- Jun 1, 2018
- 15,396
- Pool Size
- 26000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
If you use pucks be sure to get plain 99% trichlor
No blu, xtra blue, 3 in 1 etc.
those contain copper and sometimes zinc which can cause stains.
I’m in the south & during the heat of the high uv summer (100 degree days) I float a puck or two now & then to help maintain my cya & help my swcg out a little - I mainly do this simply because I have a large bucket of them that someone gave me. Be careful with not only the cya aspect but the acidic effects on ph/ta.
If i didn’t have them for free in my shed I would simply use granular stabilizer. It is much more predictable.
No blu, xtra blue, 3 in 1 etc.
those contain copper and sometimes zinc which can cause stains.
I’m in the south & during the heat of the high uv summer (100 degree days) I float a puck or two now & then to help maintain my cya & help my swcg out a little - I mainly do this simply because I have a large bucket of them that someone gave me. Be careful with not only the cya aspect but the acidic effects on ph/ta.
If i didn’t have them for free in my shed I would simply use granular stabilizer. It is much more predictable.