Hi B well I guess what I meant about more or less is if you think the co-co utilizes the nutrients more than your last substrate. If the co-co seems more absorbent and a better carrier. It looks really interesting from everything I have read and your plants look great. They say co-co naturally has some nutrients. I am sure it is really light-weight and odorless for the most part. Your nutrients do sound like compost tea. Is the fish smell strong? My aunt uses fishmeal outside and it smells very........well it smells yucky.