about a year after our pool was put in, we began to get black stains in the deep end of the pool, so we had it drained and acid washed. a year later...

Calcium deposit on coping

18,000 Gallon, Saline Pool, No Heater installed.

Pool Chemistry was WNL with test strips and standard dilution tests. Also supplemented with a CYA...

I have a underground pool, finished with marblite. Have black stains showing up at the bottom corners of pool. Anyone with suggestions on how to...

I have a salt water vinyl lined pool and have tannin stains on my fiberglass pool steps. What is the best way to get then clean and white again?

The 'check flow' warning appears. Screens check clean and backflush and rinse help. What does one do next? System was off for a few days while a...

PS water temp. is 84.9 and air temp is 81.

I had my water tested for copper and it was positive. I used sequa sol and then stain magic to treat the water. However, the stains themselves never...

when adding chlorine a black stains appear on the floor directly where chlorine is added - all chem levels within specs - PLEASE HELP

We had our pool resurfaced 16 months ago and hired a pool service to maintain weekly. We have not had any problems until recently. We have aqua blue...

I treated my fiberglass inground twenty thousand gallon pool with one gallon of stain magnet and then sequa sol and the stains are still all over the...

I notice that bubbles have formed in the fiberglass surface of the swimming pool. Could this be caused by the stain and scale removal product? It...

I just tested the blue stains in my pool with Jacks stain kit. It definitely tested copper. The kit they have to remedy the copper says you have to...

Our pool liner is 2 years old and we have had problems with wrinkles since it was installed. (pool is only 3 years old) Last year the liner was fine....

hi all,

Can anybody help . i have been cleaning a couple of pools for six months or more with no problems ( i live in spain.)

The problem is a...

I just got my water tested after noticing yellowish brown stains on sides and bottom of pool. Iron is at 2.2. I bought a quart of liquid that is...

Why is there a black greasy-like crud collecting in the pool skimmer at the water line? It's easy to wipe out, but what is causing it and is there...

my balance is good but my pool is still green i run my pump 24/7 i've been vaccuming everyday and brushing please help . itook my water sample to the...

Help! I have a fibreglass inground pool that has a a white coating of what I assume to be calcium, caused by the hard water in this part of southern...

Our white plastic parts in the pool, under the water are turning yellow.

The drain, the blower jets, the rim of the pool light and the skimmer...