I service many pools and am baffled by this one. One account has a purplish powery residue all over the walls and floor, and is now leaving stains on...

I have used stain free and metal free at least 5 times in the last 7 months and the stain keeps coming back, tan/brown and covers the whole pool. My...

I have a commercial spa that is inground gunite. It is starting to form black streaks around the wall of the spa. This is definately not Black Algea....

Hello all,

I've got a little problem I need some help with.

I have an in-ground, fiberglass pool that holds approximately 25,000 Gal. Until a...

Have some black stains at side of steps leading into pool. Some of them can come off with my nail or a stiff brush, but some of them are stubborn....

My pool is clear tests ok for ph and chlorine but the grout is going brown ( not all over but in some areas) what can do and what is the cause please

my pool has black stains on the walls and all chem are fine could this be caused by electrolysis from not bonding the salt system?

my heater fires up but wont stay on

I found white stains on the bottom of my pool. Some of them have a sort of a buble on top (like water infiltrations underneath the liner)....

Where...

I have an 18,000 gal in ground concrete pool. The pool water is dark green, and I can't see the bottom. I have balanced the PH, colorine is good....

Hi I live in san diego and since we had all the fires here and my pool had about an inch of debris and ash in the bottom the water looks green. I did...

We have an enclosed tiled pool 28ft x 15ft which was completed one year ago and filled with rain water. Recently we have noticed yellow/light brown...

I have heard you can clean a stain on the bottom of a pebble sheen pool by using an acid solution delivered through a pipe to the stain. Has anyone...

15k marcite pool w/ stains secondary to fertilizer spill in pool. Any recommendations would be appreciated.

Scott

Our pool was installed a little over a year ago with a black pebble sheen. There are places in the finish that are turning grey. It is starting to...

I have a gunite pool that was just re-marcited three years ago. Two weeks ago I noticed some yellow/green stains on portions of the steps and part of...

My vinyl lined pool is 15 yrs old. it has a heldor truflo sand filter w/a sp-712 hayward top mount vari-flo valve & a hayward 1 hp self priming...

Help!

I had let the chlorine level get low in my pool, so I shocked it and the next day I tested the water and had a low pH. So - I went and...

My little 16" above ground pool was filled with well water, but the water was run through a water softening system first. It's still brown after...

I have a customer at my hot tub store who has a 1,272 liter hot tub (336 gallons) he is on brominse sanatizer, and a natural enzime chemical line we...