I recently bought 2 Peppermint BN, as well as some Hikari Mini Algae Wafers. I put three wafers in after lights out and found them gone in the morning, but as I watched them that night the BN didn't leave their giant piece of driftwood. I suspect they eventually ate the wafers, or could they have dissolved? Hmmm.. anyway, what are the best veggies to give them? And how should I prepare them (e.q. blanch, cook, peal) Thanks in advance!