Basinly Blog
Practical pool and hot tub water care guides on chemistry, dosing and troubleshooting.
My pool turns green every spring - how do I stop it this year?
A pool that opens green was lost months earlier. When to close a pool (water below 60°F), how to balance before covering, and why opening early matters.
My salt cell says low salt but the water tests fine - which do I trust?
Salt cells infer salt from conductivity, and cold water, scaled plates, and age all make them read low. Test independently first, then do the bag math.
Why won't my pool hold chlorine no matter how much I add?
A pool that eats every dose has two problems: something in the water is consuming chlorine, or CYA moved your real target. One overnight test tells you which.
Why does my pool smell like chlorine when the test says zero?
That sharp chlorine smell is chlorine already used up, not too much of it. Why free chlorine can read zero, and the shock math that clears it.