My fish love these. I havent had any issues with it clouding the water (unless the kids poured way to much without telling me lol. Not the foods fault xD) ... they are quite small pellets. But I oldest goldfish is about 9 inches long, and he just eats them like I eat popcorn. ... the other 2 as well. The are 3-5 inches each. But they eat it up like crazy. They learned to go to the top for food because I used to feed most food floats. the sinking ones are better for them, but they dont seem to always find those before they desolve. So these slow sinking pellets I think makes it more obviously to the fish exactly were they fell.