Never heard of that brand but they look ok imo.
These will leave lots of little shiny scales in your red garnet sand.Aftermath may look awesome!
Sholud be fine.
My polys do the same with anchovies, but i cut down feeding anchovies nowThx guys...they devoured it....must be the bloody guts but i havent seen them eat with such gusto in a while
They sometimes do add attractants like oil but should be fine