Rod's was a great find for us because all the fish love it and this was what transitioned my mandarin onto frozen food (which is always nice to see). We just use a small piece to supplement other stuff we are feeding. BUT, we have seen that thick red slime in a couple of places at a couple of different times and now this makes so much sense! Hmmmm...Glad to put those together. We will definitely start just using it intermittently now as a supplemental food.