Maybe an obvious answer, but if you have calcium particulate in the water, does that count and contribute to your Calcium Hardness test results?
Suspended Calcium in Water
- Thread starter Mackhatter
- Start date
- May 23, 2015
- 25,717
- Pool Size
- 16000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
How do you know it’s calcium?
In theory, no. If you have calcium suspended in the water as calcium carbonate particulates, then it would not register on the CH test.
It's doubtful that it's calcium. Sometimes you can get calcium flakes out of a SWG coming out of the return.
What are your chemistry readings including water temperature?
What are your chemistry readings including water temperature?
PH 7.4
CH 300
TA 80
CYA 35 (Indoor pool)
Slammed the pool last week
Did it once more just to be sure
FC Steady 10
CC 0
No overnight loss
Did an acid wash 2 weeks ago with lots of brushing and vacuuming
New filter cartridges
CH 300
TA 80
CYA 35 (Indoor pool)
Slammed the pool last week
Did it once more just to be sure
FC Steady 10
CC 0
No overnight loss
Did an acid wash 2 weeks ago with lots of brushing and vacuuming
New filter cartridges
It's probably not calcium. Is the plaster getting flaky? Check the cartridges to see if the particles are getting caught in the cartridges. If you can get some of the particles, you can put a drop of acid on them to see if they bubble, which would be consistent with calcium carbonate. You could also use some skimmer socks to see if you can catch some of the particles for examination.
I’ll check my Dolphin vacuum this morning. I’ve got ultra fine filters in it. You say just a drop of MA on whatever I can get out of them? The plaster is 10 months old. In my maintenance, there hasn’t been anything larger than let’s say powdered sugar sized material. If the plaster was flaking, what size would some of the flakes possibly be?
Last edited:
And here’s one of the vacuum’s filters after a couple of hours crawling around. I was unable to scrape anything out between the pleats.
CYA is 40 (if the solution fills the tube part way between marks, always use (round to) the bigger ten)
FC/CYA Levels
| CYA (Stabilizer) | Minimum FC | Target FC | Shock FC |
| 40 | 3 | 5-7 | 16 |
I haven’t brushed it in two days. With the light on, I went to the edge and rubbed my hand along the side. It was slightly slick and after my hand went across it, a milky residue could be seen mixing in the water. That’s what I think is clouding the water in general. Where my hand went across the plaster, it appeared slightly lighter than the plaster I hadn’t rubbed yet.
Before I initially slammed, I had virtually no CYA and hence the 10 FC. With the addition of CYA, maybe my slam FC wasn’t enough? Is what I’m rubbing off perhaps algae? Whatever it is, I’m off to the store for a bleach run.
Hard to tell what it is. I don't think that it's calcium carbonate. Maybe a biofilm developing. Brush well, circulate for 24 hours and do another OCLT.
Quick question... If I have algae, would the FC not lower overnight? I just tested it and I’m still at 10 with CC at .5.
Not always, the CYA protects some of the FC from total annihilation (not a technical term
) So that's why the shock level is higher than the target FC level.
FC/CYA Levels
| CYA (Stabilizer) | Minimum FC | Target FC | **Target** Shock FC |
| 40 | 3 | 5-7 | 16 |
Ok, with the aid of just the pool light, I’m starting to see faint streaks in the walls. So I think it is a biofilm and my slam levels must not have been enough. I’ll report back tomorrow. Thanks for your help guys.
added 400 oz. of bleach per Pool Math. Whoo-wee is the water cloudy now. I hope that means sanitation is in progress. Now I brush.
Similar threads
