Iron in water source

[stcohen]

2/3 cup DE increased pressure 1 - 2 psi
pH 7.2, FC 5
Metal in solution, water opaque green.
Still doing 1 cup polyquat every other day.
Guess it's time to begin the cal-hypo again?

[BigDave]

Forgive me for asking, but, why 1 C polyquat every other day? FC of 5 for CYA 50 should be fine for algae control.
How did the pH get from 8.0 to 7.2? If you used MA, did you backwash first? How did backwash look?
CC 0.0?
Completely opaque or cloudy? Are orange particles gone?
Is DE still in filter?

[stcohen]

Wondered myself but adding polyquat per PoolDoc's origin post to me.
pH was 8.
Backwashed, mostly milky white. Got baseline pressure.
Added DE 1/3 at a time. Total 2/3 cup raised psi 1-2
Used MA to lower pH
Very cloudy, not quite opaque. No particles.
DE is in system, added after backwash.

[FormerBromineUser]

.
CC reading?
.
While BigDave is thinking, make a mental note about DE. It should work well for you in removing iron. It also is very good on an on-going basis to filter out smaller particles in sand filters. You just have to remember to add 2/3C after each backwash.

[stcohen]

Will do.
After 2 days and 2+ inches of rain I thought I better test all with 2006c kit.
Currently:
pH 7.2
FC 1.0
CC 0.4
TA 50
Ca hardness 160

[JimK]

Forgive me for asking, but, why 1 C polyquat every other day? FC of 5 for CYA 50 should be fine for algae control.
How did the pH get from 8.0 to 7.2? If you used MA, did you backwash first? How did backwash look?
CC 0.0?
Completely opaque or cloudy? Are orange particles gone?
Is DE still in filter?

I've read posts by Ben that said polyquat also acts as a clarifier, so my guess is that's it's purpose here.

[FormerBromineUser]

.
While waiting for an answer from someone more knowledgable than me, get some cal-hypo in there pronto!!!!
FC is WAY too low at 1.0.
Keep an eye on your filter pressure.

[stcohen]

OK, just added 1 cal hypo to each skimmer. Will watch pressure. Do not plan to backwash until pressure increases.

[FormerBromineUser]

Retest FC 1 hour after the tabs dissolve. I am thinking you need more cal-hypo but retesting will tell you. Get FC up to >5.0 SOON !
Please don't backwash (rinses out DE and calcium layer) until you absolutely have to. (don't vacuum to waste either)

[BigDave]

I agree that you should keep FC at or above 5ppm. Use the cal-hypo tabs to maintain FC at 5.0ppm. Let us know how the pool responds as pH and FC rises.