Who told you tigrinus were allergic to thiaminase? I have never heard of that before. Doesn’t seem to be true, no? Most seafoods contain thiaminase and if what you were saying is true, you basically are unable to feed tigrinus any frozen foods anymore.yeah this is true, i just came down stairs and he seems active at night, he ate all the neocardinia and bamboo shrimp originally in my tank so that might work, problem is that there’s gonna be a tigrinus in the tank and they are allergic to thymanine ( dunno if i spelt that right) found in shrimp so im trying to ween him off