As has been reported many times, there are tig owners who swear that feeding crustaceans killed their tigs, but then there are other peers who report no problem with moderate or occasional inclusion of crustaceans.
I for one never understood why exactly crustaceans can kill tigs. My only two worthy thoughts have been:
- thiaminase richness of crustaceans
- formalin used as a preservative on shrimp for human consumption, maybe other crustaceans too, IDK.
Russ' data are very encouraging that fortifying shrimp properly can overcome the first problem even with 100% diet of shrimp. Skipping that (as Russ says he did sometimes) IMHumO would be playing russian roulette. I'd never skip, especially adding vitamin B1, which is destroyed by thiaminase.