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I have been doing a lot of testing while slamming my pool. Now I have a tacky hazy residue on my chlorine cylinder and my blue spoons are black(bowl area). I find this weird since I am very careful to rinse before and after every test. I would like to clean the chlorine cylinder and spoons...

Hello everyone! My husband and I moved our family end of last summer and we bought a home with a pool. I will be taking care of its chemistry. We've been doing a lot of reading and learning on your site. My girls are learning about chemistry and lab work with the TF-100 kit and helping out a...