Pellet Feeding rings or frames are to keep pellets from floating to shore and becoming uneaten food that grows unwanted algae. I use wind baffles on my rings. I use vinyl siding cut into strips so it has 2"-3" above and below water. Aggressive fish feeding activity splashes lots of pellets out of a ring with no baffle.
See this thread where near the bottom ewest show pictures of TJ's creative and very successful fry production way of building SMB nesting sites on top of a pallet to keep it more out of the bottom sediment.
https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=92626
