New to TFP but not to pools. I needed to replace the zeobrite in my filter as its about 6 years old and not doing quite as good a job as it used to. Went to the store since I had to replace the strainer basket in the pump. Anyway, they sold us Vitroclean filter media. We didnt really think about it until we were home when my wife said she wasn't sure about putting "glass" into the pool filter (makes sense) seeing as how there is a vinyl liner. I have not opened this as I need advice on whether or not it should be used...what should I do?