[Marianne]

I have unfortunately neglected my 50 gallon reef tank on and off for a year. This week I did a 50 gallon water change split into two days and thoroughly cleaned the whole aquarium. My tang is so happy!

I have a question regarding the expiration of chemicals. I have Kent Marine Strontium & Molybdenum, B-ionic Calcium Buffer System Component 1 and 2. Do these expire? I can't find anything on the bottles. On the B-Ionic it states that the chemicals were tested on 05/29/02, other than that nothing. I know I bought these way past 2002, probably 2005.

I want to make sure these are safe, before I use them.

Thanks,
Marianne