I haven’t added anything except chlorine. Most if not all of the culprit of my algae this year was some of the last of the water/leaves falling g off the cover and into pool when I opened. Could that have caused metal contamination?
CYA Testing
- Thread starter kcassidy0772
- Start date
No. The green tint is either iron or copper and many times (but not all) iron goes brown. So it more likely copper which just so happens to be in all those 'Xtra blue' products, algecides, PoolRX, etc.
Was the pool new or did you move and inherit it ?
No I bought the pool 8 years ago. Also, what is the reasons for increasing CYA by 10? For reference, my CYA is 40 now ( I ordered sample solution yesterday but when I tested again yesterday the dot was definitely basically not visible at 30)
Because you lost 5.7 FC yesterday, which is abnormally high, but lost none overnight so it's excessive UV loss.
FC/CYA Levels
I'm in full sun and 30/40 wasn't cutting it for me already. The UV seems to have spiked early in some places. Time will tell if it stays where it is, or keeps going.
Oh ok. Wow I didn’t think 5.7ppm for a whole day was a lot considering the sun. I thought CYA didn’t make a difference as long it was between 30-50. And then depending on where you fall in there determines appropriate amount of chlorine. Going ahead to raise 10ppm now!
That's the utmost peak in the hottest climate on the worst day of the year. On Long Island in early June, it's a bit much.
We aren't entirely sure you're at 30 yet. Or your pool is telling you it needs to be a little higher like mine did.
Definitely this part too. The CYA level sets the appropriate FC level.
So just took my third reading of the day. Started at 16.5ppm at 5:30, 15ppm at 1pm and 5:30pm 14ppn. Will take 1 more reading at about 9pm but looks like won’t be adding any chlorine today. I added the 10CYA at about 10am.That's the utmost peak in the hottest climate on the worst day of the year. On Long Island in early June, it's a bit much.
We aren't entirely sure you're at 30 yet. Or your pool is telling you it needs to be a little higher like mine did.
Definitely this part too. The CYA level sets the appropriate FC level.
Last reading for the night is 11.5ppm. So today was still 5ppm total loss for the day. First part of the day was cloudy so I didn’t expect to lose just about as much as yesterday.
Ok, first test of day is 12ppm. Only had 11.5ppm last night so something a little of. But did not drop. Anyway. And 0 CC.
It might take a day for the CYA to mix up and do its thing. If loss is still in the 5ppm range after a couple days, we'll add 10 more.
One drop off is great either way, it could be as simple as test variance
I always blame both too little and too much coffee for the AM test. Like at the same time.
One drop off is great either way, it could be as simple as test varianceQuestion- if I want the FC to come down anyway, why try and raise CYA now? Lots of questions I know, but I find the CYA/FC relationship the most challenging.It might take a day for the CYA to mix up and do its thing. If loss is still in the 5ppm range after a couple days, we'll add 10 more.
I always blame both too little and too much coffee for the AM test. Like at the same time.
It's not really now. In a couple days the FC will be operating at target range, and we'll see if you're still losing 5 ppm a day at that point. It will convienently give the previous add some time to mix.
To recap : excessive FC loss is
1) algae
2) environmental crud/ bather load
3) low CYA
The OCLT (passed 3 of them in 5(?) days) removes both algae and environmental. The wind doesn't stop at night so your yard crud is still blowing in and would eat FC.
You haven't to had any parties or high bather load so that's out.
That leaves low CYA.
*once we're down in target range. (It may fix itself at that point).
*with any luck being in target range also brings the blue back. You have no staining so the copper (if so) is present, but below the staining threshold. You can take your time exchanging 25% (?) of the water at that point for more wiggle room just to be on the safe side.
Just did my first test since 5:30 this morning. Got 12.5ppm, actually .5ppm higher than this morning. Will test again at 9:00pm for a final for the day
Dang that +10 CYA is magical, huh ? It done went and gave you a SWG.
Clean the vials and stir bar well.
Clean the vials and stir bar well.
I clean them after every use with alcohol and I have the stirrer that came with the kit.Dang that +10 CYA is magical, huh ? It done went and gave you a SWG.
Clean the vials and stir bar well.
Without a reason to suspect anything off, I never clean mine except for a good rinse. If i had a weird test, like the FC went up twice on its own (without me or swg) then I'd clean them with alcohol.
Hold off cleaning them unless you need another OCLT. You've proved it wasn't dirty equipment.
Ok, just did final test for my he night. 10.5ppm. Did it 2 times just to be safe and same result.Without a reason to suspect anything off, I never clean mine except for a good rinse. If i had a weird test, like the FC went up twice on its own (without me or swg) then I'd clean them with alcohol.
Hold off cleaning them unless you need another OCLT. You've proved it wasn't dirty equipment.
1st test of day 10.5ppm. No change since last night. Definitely going to skip the OCLT going forward. Passed it for multiple days now so I’m not going to rush in the morning to get my testing before sunrise.