insect

Can feeding these foods too often to a Leopard Cteonopoma cause digestion problems because of the shells? My Leopard Ctenopoma will often spit out krill shells and make a mess even when I break the krill up into bite size pieces. I can't exactly remove the shells on these freeze dried foods...

When I went to take a short video of my fry, there appeared a type of water bug in the tank. This bug I quickly netted out and threw into the other fish tank whereby the adults grabbed it fast. Does anyone know what it is? and also, is it the type of insect that eats fry?