I recently read about constipation and swimming bladder disease in Bettas. I realized that my Betta showed a couple of the signs of these when he died. He was lethargic, stayed at the bottom, and was tipped forward at times. I only had him for a week. I may have overfed him, and I also read that you shouldn't give too many blood worms because they cause constipation. I was giving him them every other day....I feel awful. I NEVER want this to happen again. I researched SO much before buying one, but apparently I didn't read enough about feeding them. What should I know about feeding them? Are blood worms not safe? Is constipation that common? Are Bettas that fragile?