i have a 37,000 gallon concrete pool. i am shocking it, but my calcium hardness is 480. everything else is within range. thanks!

I live in Arizona and my water chemicals are out of whack. My calcium is over 800 and my cyanuric acid is over 150.

I have seen advertisements for services that have...

In my understanding calcium scaling /build up on pool surfaces results from either leaching out of concrete due to low CH of water or scaling on walls as a result of...

I have a fiberglass pool with a salt system and an auto cover. I am getting white and blue flakes that are settling on the bottom of the pool in front of the returns....

Bought my house 3 weeks ago with a inground gunite pool. Everything had seem to be going ok until the other day when I noticed what looks like rust spots on the bottom...

I have a scum that is building in the skimmers and now in the chlorinator. It starts as a tan color of putty consistency then turns black. Can anyone tell me what this...

I have grey spots in the bottom of my pool. I would like to know what these spots are and can they be removed. I tried brushing with a wire brush but not effect on the...

I have the TF 100 test kit and have been happy with it other than I cannot seem to get the CH test down.

Pool store will show 220-260 and i will get 400-420. I do have...

I was wondering why my pool water has a 'lemony' taste to it? Other people have noticed it, my levels all seem to come out ok when I use the test strips, ph is on the...

We have a 3 year old fiberglass pool and we keep getting a white powdery residue on the walls. When you touch the walls the stuff comes off on your hands. What is that?...

Hi, I have a 6 foot vertical wall that runs the length of my pool (about 30 ft). It's a textured type of tile with brown grout. It's very hard to clean from two...

Will dumping large amount salt into pool without a SWG help the hardness? A friend did this and i'm not sure it is a good idea...

Hi all ... I was just sold some Pool Season Calcium Increaser by my local pool store guy after he tested my water and he told me that my calcium was very low. After 17...

I am using a Taylor 2006 test kit. My Calcium Hardness is 280ppm

My question is with regards to the color change with the test kit.

I see a change from Red to a...

Salt softens the water, so what is the effect when you are trying to increase the hardness if you have a salt system. I have been purchasing the water softening salt...

We have a 15,000 gallon pool and jacuzzi. When I was cleaning the jacuzzi with a wire brush I noticed groups of dark black or dark blue little rocks that are connected...

When we talk about Saturation Index, does a total hardness mean anything, or are we just concerned about Calcium?

I've recently aquired a pretty basic tds meter and it got me wondering. The instuctions for many of these things say that they are for testing at a specific temperature,...

I am considering adding a Intermatic chlorine generator to my in ground pool. I had the pool resurfaced several years ago, and I am told that the contractors probably...

we use well water for our home and pool. the water for our home goes through some filters a softener and a uv setup. do we need to use a pool water softener too?

i will...