FC 0.5, CC 0.5, CYA 0, pool green

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I bought 1 pound of cal hypo at 73% for $5 from the pool store back in April. Adds 10 FC to my pool.

One gallon of 10% from Walmart adds 12 FC and is $4

No brainer in my situation. I will say that I won’t make a special trip to Walmart just for the pool essentials. It is 30 min out of my way, so unless I’m grocery shopping, I just stop at the local store for 6% which adds 7.3 FC for $3 and some change.
 
mknauss said:
One lb of your cal hypo adds 2.1 ppm FC to your pool.
It takes 80 ounces of 10% liquid chlorine to add the same FC.

Depending on what you pay for liquid chlorine, you can do the math. Typically is close to a wash.
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Yes, close to a wash b/w the LQ and CH. Bleach might be a BIT cheaper, but only if found at rock bottom prices at the dollar store.
So you think I could get this? Is it a good price?
 
That's fine. Same thing sold at Walmart for a few pennies less in most places.
Not sure what kind of places you have nearby. Some folks in your area talk about Ocean States Job Lots.
 
mknauss said:
That's fine. Same thing sold at Walmart for a few pennies less in most places.
Not sure what kind of places you have nearby. Some folks in your area talk about Ocean States Job Lots.
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I'll drive over to Lowe's and get it when I run out of the hypo. I think it's down to "what's close enough" at this point. Nearest OSJL is twice as far away as Lowe's so not worth it I think.
 
Don't walk about the pool pouring muriatic acid in, just find the strongest return working and pour in a very thin stream into the flow of water. It will help dilute it and mix it quickly. I always brush the area of the pool immediately also, just to be safe. Stand upwind from it.

Maddie :flower:
 
Found some bleach in a store that's unlabeled, so I assume 5.25%, but still better than Lowe's. Haven't seen any 5 gal jugs at 12.5%. Where would you get those?
111008

I put the last line in for ship of fool's item for comparison purposes, which I have not seen myself unfortunately.

This mornings testing:
pH: 7.2
FC: 11
CC: 1
CYA: 25

Maybe I was off on the CYA additions yesterday. Despite using the sock method, it was still a bit low this morning, so I added the other half of that 5-pounder. Should get it to between 30 and 40.
 
CYA can take a day or two in your system before it registers on the test.

12.5% is typically labeled as “liquid shock” and sold by many pool stores and some hardware stores.
 

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Have you tested your CH? Cal hypo is fine to use as long as you understand and manage the addition of calcium.
 
IceShadow said:
CYA can take a day or two in your system before it registers on the test.
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Well, I guess the worst that can happen is I'll hit 40, which is still in the ideal range, and then I'll lose it to backwashes, getting closer to 30.
12.5% is typically labeled as “liquid shock” and sold by many pool stores and some hardware stores.
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Hmm. The three hardware stores I have around here are HD, Lowe's, and Ace and the closest thing to cheap liquid chlorine I found was that 1 gal bottle I linked to from Lowe's. And it's only 10%.

mknauss said:
Have you tested your CH? Cal hypo is fine to use as long as you understand and manage the addition of calcium.
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I tested the CH yesterday. See results a few posts above. I'll probably stop getting the Cal Hypo and stick to Sodium Hypochlorite and bleach once I use up the dry shock. What are the risks of high calcium?
 
CH of 200 is a bit low for a gunite pool. It would not hurt to use cal hypo until that got to 250-300.

High calcium can lead to calcium scale. pH, TA, CH, and water temperature all play a part in that process.
 
So I looked at the calc and since I added 56% cal hypo x 6 lbs last night, that would have gotten me to 12 FC, meaning I lost 1 ppm over a period of 14 hours from 10PM to Noon. Tonight I'll test again and then pour in some of that mystery bleach and see what it measures tomorrow.
 
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Lemonred34 said:
? I wish. I think mine was $2.50 or so. I swear, I can’t find anything cheaper than $3 within 30 miles of where I live. One day I’ll drive the extra 30 to get to Lowe’s or Home Depot to see what they have to offer.
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Plan ahead on that drive and do an on-line order with store pick up for your chlorine. That way, it won't be a wasted trip, and if they don't normally have the pool chlorine in stock, they'll get it for you.
 
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