When you "were" cycling the tank, I assume it's already cycled?
I'm probably going outside of the question asked but personally from experience I feel the so called cycle boosters are somewhat misleading and don't really do much to help the cycle, if anything I feel it might disrupt the cycling process, one of the reasons I asked why did you want to use them at all.
If your tank is cycled, then you shouldn't have to use it and if it's not, my suggestion would be to let it cycle on its own.
Should you still feel you need to use these products, I would follow their instructions as you mentioned.
Good luck, keep us posted!