Hey Sam
I'm wondering if you rehydrate your food sometime before you feed your fish dehydrated rotifers?
Just thinking that dehydrated food in the fish gut might not be great for the fishes health?
Sorry for the hi jack. The toughest fish I have had was served to me at a restaurant labeled as salmon. I think the chef might have taken it fresh out of a bears mouth and fried it extra long to rid it of potential saliva worms? Completely unedible and tough, it was like chewing wood. I sent it back to the kitchen and the brought it back without the cedar plank.