You may want to give freeze dried krill a try also, my 6.5" goliath almost gourges itself on them, as soon as I toss a small handfull in, it's at the surface snatching krill with calculated gusto! I feed every third days. I myself may give frozen market shrimp a try too, I just have to find a way to keep the mrkt. shrimp at the surface long enough. But anyway, GL with feeding and careing for your g-tiger.