I'm detecting a little bit of popeye in my Betta and got some Maracyn 2 to treat it. The directions read, Add the contents of one packet per 10 gallons of water and repeat every 24 hours for 5 days..."

My question is why do I have 8 packets in the box? It seems like the last time I had to use Maracyn 2 I added two packets the first day, but the directions don't say that and it still leaves 2 packets. I have a 10 gallon tank. Are these just for if you have a tank larger than 10 gallons or are the directions off?

Thanks for you help!