BLACK SPOTS

Algae problems in swimming pool water.
Green (cloudy) water or slimy pool walls.
Black algae. Mustard algae. Pink or white pool mold.
DEBBIE9

BLACK SPOTS

Postby DEBBIE9 » Sat 23 Feb, 2008 07:02

:( I HAVE BLACK SPOTS OR BLOTCHES ON THE BOTTOM OF MY PEBBLE CRETE POOL
I HAVE LOTS OF TREES HANGING NEARBY & SOME CUDAGI TREES WITH BLACK SOOT WHICH FALLS ON EVERYTHING BUT THIS WASHES OFF VERY EASILY WITH SOAPY WATER
THE SPOTS ON THE BOTTOM DONT EVEN SCRATCH OFF WITH THE HARD BRUSH
THE POOL IS BALANCED & I HAVE TRIED ALGAECIDES
THE SPOTS ARE SPREADING FURTHER ALL THE TIME

CAN SOMEONE PLEASE HELP? :(


Poolz

Black algae

Postby Poolz » Sun 24 Feb, 2008 17:05

Hi Debbie
Why have you assumed the problem is algae? It could be a metal stain of sorts - most likely manganese or silver.

Have you tried the sock test? Apply a sock filled with chlorine to a stain for 10 - 15 minutes. Check if the spot changes. If so it's an organic problem and probably algae.
Then apply a sock filled with dry acid to a stain for 10 - 15 minutes. Check if the spot changes. If so it's an inorganic problem and probably a metal stain.

P.S. PLEASE DON'T SHOUT HERE (we can all hear perfectly)

Return to “Pool Algae & Green Pool Water”

Who is online at the Pool Help Forum

Users browsing this forum: No registered users and 1 guest