I have one 4 month old african clawed frog (albino) In a 10 gallon filter tank, Heated,lighted tank. Well Hes getting kinda big for for SM Sinking pellets. So I'm changing his diet to ReptoMin, Cichlid Gold , Red reptomin mix. But problem is he is so use to sinking foods he cant find floating foods!I tried putting a cichlid pellet in front of him and bbrought it up slowly but he took a bite and went down. I tried this about 5 times in 2 days. PLEASE HELP! btw I changed his substrate from sand to gravel because sand clogged my filter 3 times and grew lots of algae