I added 8 pounds of a powder, probably sodium bisulfate. Have stains at the bottom where I added too much and it fell to the bottom. Any idea of how...

I have a new fiberglass pool. I am using pristineblue.

Ph 7.2

Alkalinity 50

Chlorine 0

After adding pristineblue ( copper ) pool got black,gray...

I will be using ascorbic acid to remove iron stains from my vinyl liner. I just opened my pool and I'm sure my chlorine is at zero as I have not...

We have a well and as our pool filled it was yellow I shocked it and now it is a iced tea brown. It is almost ot the level that we can start running...

I am a community member with a community pool. This pool has never been drained in the 5 years the community has been here. In the mean time we have...

I discovered rust in my pool heaters cast iron headers. There were small globules of rust built up around the inlets and outlets. I...

Hi All,

I recently purchased a home in Arizona that was vacant for several months. Unfortunaltely, the dirt/sand/debri that was in the pool has...

I have major vinyl liner staining from the rust in my pool heaters cast iron headers and I have positive results from the vitamin C test and will be...

I am a new pool owner and have been readong this forum for a couple months now. I have been going to the local pool store with my water and they also...

Our pool is 1 year old, and no matter what my husband does chemically, the stains (algae, dirt, rust) won't go away. I'm thinking it may be time to...

We have a salt pool and have green and black spots on bottom of pool. went to leslies pools had water tested they had us add 11lbs of alkalin up,...

I am required to keep our commercial pools at 3 to 5ppm chlorine. I don't think the Minnesota state pool inspector would accept anything lower. Also...

Hi Can you help I have a small salt water pool the problem I have is the P/H is very high colour purple the chlorine level is 2.5 but the water looks...

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?