MY POOL WATER IS NOT ALL THE SAME COLOR?
Of all the myriad questions that are presented to swimming pool designers and builders, the most common question is "What color is my pool going to be?" This is a very complex and complicated question to answer, and frankly, the real answer is a moving target. Pool color can be affected by a number of factors, and can change dynamically depending on the environment. This post from Swimmingpool.com gives a very good explanation of these factors, as well as what a consumer can expect from the final product.
Here is an excerpt from the post: