We are but like I said, this is a RN forum, not a IA forum. We only offer RN support here.
I can assure you SD is not what you want and you will get into trouble with using it. 1 drop would be more then your tank would need or even handle. There like 20,00 or so drops in a 32 oz bottle.
You are feeding one small clam, you only need a 6oz of Phyto-Feast and I doubt you'd even finish it prior to the "Best Before" date.