Okay.. since no one uses liquid vitamins, this is an e-mail I've sent for inquiry to the company.
I've purchased the Dick Boyd Vita-Chem for Freshwater Fish last year and only used it maybe five times (on and off). I didn't use any more since then until last month when I found my bottle of it in a storage bin. Should this product be refrigerated? It is my understanding that liquid vitamins are usually effective if is refrigerated (especially after one year of non-use). Is there any truth to this? Also, shouldn't there be an expiration date on the bottles of liquid vitamins?
I thank you for taking the time to reply in full to my inquiries, and with that, I can further discuss with you further.
I'll let you know the outcome. Hopefully someone will respond.