Joe I was orginally using Purina sinking fry food, can't remember the number. I ran out & the only dealer around couldn't get it in unless I special ordered it. So I bought game fish chow. I soaked it in water until I could mash it up so it would sink (usually took 30 min or so) & they ate it like crazy! I never bought the expensive stuff again. But it was higher protien.
