Before I took my 10+ year break from the hobby I had purchased some sea Chem supplements which I ended up never opening. They were stored in a cool dry place since then. I just found them the other day when I was doing inventory of all my aquarium equipment and supplies. There are some dry supplements and some liquid. I can get the product names if needed. As I stated, they are all sealed and never opened. What do you think? Any chance they can still be used?