Yep that's the one, and to be honest I don't know much about the pacman food. I choose to feed live feeders because I believe this is what he would want over the other, and I believe you get a better feeding response from something that has natural movement over something you have to wiggle and make movement yourself. But there is people that use it and swear by it and from what I have read there is some breeders that throw it into the frogs diet. For the length of how long it lasts most keepers suggest to replace all vitamins after 6 months and to store it the fridge. I have never actually went through a full bottle before the 6 month mark so I just throw it away and get a new bottle, but I get the big one. For one frog you will only need the small bottle.