I think I've generally read somewhere between 1-5% for the carapils. If you subbed the carapils for the crystal, that looks like it would put it at about 6%, which is on the high side but if you don't want to save a few ounces, I don't think it would hurt. Also, just in case, make sure you check the ingredients that went into your golden light DME. Some brands include a certain percentage of carapils already in their extract formulations, in which case you wouldn't probably need to add more. You should be able to find the formulation either from the manufacturer website or from the homebrew place you bought it.