Water Very Clear with Light Turquoise Tint

Mak1155

New member
Dec 27, 2021
3
Ontario
Hi All,

I had a Fiberglass IG pool installed a few years ago and have been following TFP guidelines for balancing and levels have been easy to maintain since initial balance (Thank you!!). After opening the pool this spring I added liquid chlorine and had a momentary lapse in judgement and unfortunately added one pack of Bioguard Smart Shock. The pool initially cleared but shortly after has maintained a very light turquoise tint (only visible in deeper water) even though water is still perfectly clear. I took a picture but the turquoise didn't even register in the photo. No staining. I recently completed and passed an OCLT test so have ruled out algae. I took a sample to local pool store for copper testing and it came back indicating 0 ppm (although I understand these tests can be inaccurate).

A few questions:
- Would the amount of copper in one 1-pound pack of Bioguard shock (Product Information: 63.05% sodium dichloro-s-triazinetrione 0.26 copper (metallic) 39% available chlorine pH...) be enough to cause this?
- Since the tinting is very light and appears to not be staining, can I manage this by small water adjustments and adding new tap water rather than a full no drain water exchange?
- If not copper, what else could possibly cause this?

Current Test Levels:
FC 6 ppm
PH 7.6
TA 60
CYA 30 (working to increase after lowering water level a few times throughout the winter season)
CH ~100 (working to increase again after lowering water level throughout winter)
Salt cell has not been turned on as water temp is still a bit below 60F

Thanks!
Matt
 
Bioguard Smart Shock.
Is that the usual/previous go-to ?

It has copper in it and when copper comes out of solution it will tint the water. It'll be perfectly clear but died green.

Many shocks/algecides/ pucks or 5 in 1 this or that's add copper. Repeated use causes issues but one bag didn't do it.

 
First opening following pool install (Spring 2023) I used 1 pack. I had purchased 2 at the time, this was the second (I thought I'd use it since I already had it). Water level has been lowered many times since first pack was added due to offseason rain/snow.
 
It could also be iron from your fill water or tainted bags of salt. Chlorox brand was one that bit a bunch of people.

Stuff your skimmer(s) full of polyfil while it's tinted and they will turn brown and/or look Iike they are leaking Iced Tea when you pull them out if it's iron. If not it's copper.