On 10-30:
My pool is indoors and was cloudy/white 2 days ago w/low FC for 1 day. It's been beautiful for the last 3 months. I shocked w/recommended 12 to 16ppm FC w/6%...

I have a customer with a white marble dust pool with goose crap stains all over the bottom. The stains have been there for 2 years. The marble dust is only 3 years old I...

Back in July, I had a HUGE green algae problem. I super-chlorinated and added a double dose of Copper Based algaecide (Strike Out) twice. After the water cleared up and...

I was wondering what would actually cause the stain when a goose dropping sits on marble dust. I assume this is a biological stain but was wondering if maybe there was...

why not acid wash vinyl liner, i have seen many people say not to , but dont see any that says why not , what will it do, i have had great luck with mine

Too low of ph cased acid condition in my pool and caused copper heat exchanger in heater to turn liner light black discoloration. will this stain go away on its own?

Help....I have had three pools before and this is my first one with a salt system. Iam always adding acid and when Ive asked advice from my local pool store their...

I opened and shocked my pool just a few days ago, as usual. Suddenly, a sand like substance appeared on the bottom and side walls of my pool. It cannot be brushed away....

Hi all,

So for the most part my knowledge of chemistry and my major in it helps me with maintaining a pool, though I cannot say I know all the intricacies of pool...

Hi,
We have a hotel pool which the last few days has developed a 10cm yellowish color above water level on the liner walls. I'm almost sure that comes from sun oil...

1 year old gunite pool. Northern California city of Willows water. Scattered, (some large) brownish stains. Contacted pool builder numerous times, (each time I get a...

This summer (my second as a pool owner) I got lazy on my testing. I use a Taylor test kit. Anyway, the pool was looking great. I had beautiful sparkling water and I took...

I've been trying to brush this away for weeks and the stains don't move. I showed these pictures to the guy at Leslies, he told me to squeeze a lemon on it to see if it...

hi can anyone help the problem i think is sun tan oil or self tanning lotion its leaving a yellow/brown ring around the pool at the water line about 3 to 4 inches high,...

We have a 34 ft round above ground pool. Our water is clear and we have been using chlorine tablets to keep the water clean. Now we have a light brown build up in the...

We have a 36,000 gallon inground pool with a vinyl liner and a sand filter. We also have well water with a high concentration of iron. We opened our pool late due to bad...

This morning I shocked pool using bag of shock that had a corroded aluminum clip on it to keep it closed, A flake of rust was on the bag and it feel into the pool as I...

My steps look brown. What could be causing that?

I found out the hard way that I have metals in my water. I have already add the needed chemicals in my pool, stablizer and conditioner, chlorine, etc - Even added the...

How do you remove Black Walnut stains from a Vinyl liner? Any suggestions? Would bleach harm the liner?

Ive tried some Omni Stain cleaner with the cleaning mitt but...