Aqua Chem 3 inch chlorinating tabs, it says trichlor under ingredients. I DO NOT use tabs at all anymore since I found this site, but I have just drained most of my pool due to metal staining and my cya is a bit low. The old owners of the house left these tabs and I used them at first until I switched to liquid chlorine only. Can I temporarily use these to raise my cya a bit? Does anyone know if these contain any copper? I am just scared to use them because if they do I will have to start all over! I was told by someone that might just be where all of the staining came from in the first place.
I would buy new ones at pool store but they are out of the smallest container and I don't want to buy a lot.