I'm confused

[waterbear]

Yeah, that's why Wal-Mart stopped carrying the good stuff--the 68% and pushed HTH to supply them only with 48%--junk. WallyWorld had a warehouse either burn down or get badly damaged from mis-handled Cal-Hypo causing a fire.

HTH still has the stronger stuff. It's Super Sock-it but it's only sold in pool stores (we carry it). The regular Sock-it is the 48% stuff. (We carry it also.)

[Spensar]

"Meanwhile, vacuum to waste and brush the pool once a day."

Be sure to follow up on this bit of advice, it's important to clearing up the water quicker. When you shock and kill the green algae, it is dead but still there. That's part of the cloudiness after wiping out the greenies and it's a lot of the fine residue on the bottom of your pool after the greenies are dead.

I opened to a green mess for the first time this spring and zapped the green stuff in about a day and a half with LOTS of 12% chlorine, then turned the pump off until the residue settled to the bottom and vacummed the junk to waste.

[topless]

The sun is out, finally, so I was able to open the pool. It's still cloudy, but blue not greenish.

temp -75 degrees
FC -0
TC -3
cya -I added this am 4 hours ago, 55 ppm
ph - 7.2
cal - 0

I just added 5.68 gallons of bleach. Monday, I get my cal-hypo granules. I also bought 3" cal-hypo tablets (65%). Boy, pool chemicals are a rip. I bought 55 lbs of cya for $44.55. 55 lbs of cal-hypo tablets for $88 and 50 lbs of granules (73%)for $75.50. That may not be the cheapest, but compared to $35 for 8lbs of cya from Leslies it is most reasonable.
I vacuumed the pool before I added the bleach. The foaming is much less, but still there.
I did put the cal-hypo tablets in my chlorinator, and plan on using it unless that's a really bad idea? They don't contain any cya, these are sold for commercial water treatment, not sold specifically for pools.

[Poolsean]

You should not use cal hypo tablets in a tri-chlor tablet feeder. It needs to be vented.
Waterbear, do you agree?

[topless]

3 hours later testing

temp -76
FC - 5
CC- 2
cya - 55
TA -280
CA -0
ph - 7.2

I'm adding 3 more gallons of bleach to bring chlorine back up.

Why is venting needed on tablets? If I can't use the feeder, then I can still crush them and throw in the pool.

[waterbear]

Poolsean,
I agree, all the cal hypo tablets and capsules I have seen are designed for using in the skimmer or some of them can also be used in a NEW floater that has never held trichlor. IMHO, they work best in the skimmer. They should not be used in a trichlor feeder which is pressurized! It is possible for an explosion to occur.

[topless]

So, I should use these by dropping them in the skimmer? How many at a time?

I tried shutting off the pump to let the pool settle overnite and it didn't change it's appearance at all. It did lose virtually all it's chlorine. I had 14ppm FC and 2 CC before, and this morning it's .5 and .5. Nothing else changed. I raised the pool level in the afternoon to the normal level several hours before shutting down and brushed everything. I think I found some additional algae that missed the chlorine shock last week. That's the only thing I can figure that would explain the big loss in FC.