green pool water after vacuum

Algae problems in swimming pool water.
Green (cloudy) water or slimy pool walls.
Black algae. Mustard algae. Pink or white pool mold.
ahvroom
I'm new here
I'm new here
Posts: 2
Joined: Wed 25 Dec, 2019 11:48
My Pool: approx 5 x 8 mtr
with astral sand filter

green pool water after vacuum

Postby ahvroom » Wed 25 Dec, 2019 12:00

Merry XMAS, and please dont shoot me for not knowing all the values of the Ph, Clorine etc.

Situation is like this
my sister just moved to Spain and has a pool.
approx 5 x 8 mtr

the water was clear, but the whole bottom was covered in thick layer of algae.
I took the vacuum and used the pump to remove all the alga from the bottom

had to clean the filter many times and did good number of backwashes of the sand filter.

the bottom is now free of algae BUt, the water is now green.
probably from the movement of the vacuming.

what do: Just let it rest and the another vacuum??

please give me couple tips. Would be most appreciated

and the Ph (with a testing kit) look ok (light red)
but the clorine did not show in the test kit. So I added a tablet in the filter.

there is a witerizing container hanging there. It smells like a clorine bomb.


thanks
Alex


Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 1379
Joined: Tue 06 Sep, 2011 05:48
My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: green pool water after vacuum

Postby Denniswiseman » Wed 25 Dec, 2019 17:40

You really need a FAS/DPD test kit to be sure of your numbers
FC:
TC:
pH:
TA:
CH:
CYA:
You will also need to Slam (Shock Level and Maintain)
You say you added a tablet which I suspect is Trichlor or Dichlor. If this is your normal way of chlorinating then you probably have an excess of Cyanuric acid which renders your chlorine ineffective as indicated by your Chlorine / CYA Chart
For every 10 ppm Free Chlorine (FC) added by Trichlor, it also increases Cyanuric Acid (CYA) by 6 ppm.
For every 10 ppm FC added by Dichlor, it also increases CYA by 9 ppm.
For every 10 ppm FC added by Cal-Hypo, it also increases Calcium Hardness (CH) by at least 7 ppm
ahvroom
I'm new here
I'm new here
Posts: 2
Joined: Wed 25 Dec, 2019 11:48
My Pool: approx 5 x 8 mtr
with astral sand filter

Re: green pool water after vacuum

Postby ahvroom » Fri 27 Dec, 2019 08:54

Thank you for taking the time to answer

But. It is my sister’s pool. She took possession of her new house last week (incl the pool)

So. There is no known history.

I cleaned it to the extent of my capabilities (not much). And advised her to get a pool-expert to come and to get a maintenance contract.

Bests

Alex

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