I got two bags of the 500 the other day. I dumped in a bag on top of a small amount of mixed 400 & 600. The feeder was jammed the next time I looked. The 500 had some big blocks of clumped together feed. I went through the feeder putting everything into 5 gal buckets. I threw a bunch away. It didn't look right. I am not sure if it was like that when I dumped it in or not. I'm going to look through the second bag of 500 as I put it in the feeder, and make sure there are zero clumps. If so, I'm taking it back to the dealer. I don't know if it's new production, or something older that they found. The YP love it though.. They are small, and can't take the 600.

9 yr old pond, 1 ac, 15' deep.
RES, YP, GS, FHM (no longer), HBG (going away), SMB, and HSB (only one seen in 5 yrs) Restocked HSB (2020) Have seen one of these.
I think that's about all I should put in my little pond.
Otter attack in 2023