I just got some of this as treatment for a little bit of ragged mouth on a couple of pyramid butterflyfish, but have no experience with it. Two questions please. One, I though I read somewhere that NGF can make fish a bit groggy - mine certainly appear less active after starting treatment? Second, am off for a few days, is it ok to not do subsequent additions of the powder and then resume when I get home (instructions suggest this approach for bigger tanks)?