Our in-ground pool was not properly covered over the winter. Through the fall and winter, lots of leaves ended up in the pool. When we started springtime cleaning, the...

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 to remove the...

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 spots.

And a black...

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 added any since last...

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 the filter but is...

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 a lot of staining...

I discovered rust in my pool heaters cast iron headers. There were small globules of rust built up around the inlets and outlets. I knocked/wire-Brush/scraped off and...

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 left some pretty harsh...

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 proceeding with...

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 teach me a lot...

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 do it's first...

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, 4lbs of conditioner....

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 I have 3ppm iron in...

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 green with no algae...

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 tile and grout. cya...

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 pool is inground,...

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. My readings are as...

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 couple of weeks ago...

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. Figured its Algae so...

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