I don't use either cuttle bone or any "supplementation" like custodian fuel!
Also, I find that there are a lot of products on the market that are over advertised in general. That's were forums such as this one really help, they act as communal research so no one individual has to go out and buy all of these products. We all use information from one another, which helps from over spending on products that you don't really need! Granted there might be a certain time and place for some items, but from my experience the springtails don't need anything special.