As much as I hate Aquarian, i have found their algae wafers to be much better than the Hikari ones. I found plecs dragged the Hikari ones under the tank decor and left them, made water quality really bad, i know at least 8 people who have had same problem...
Bristlenose are happy to eat normal fish flakes, frozen food, tank algae, decomposing plants etc so they dont need a huge ammount of supplementing. Hikari have come out with the 'Hikari - Algae Wafers "Mini" ' and they are prfect for bristlenose, they are much smaller...
I would put in one mini pellet 3 times a week for a bristlenose and up it as they grow or if they eat it all right away.