I currently have about 25 Endli Bichirs that I've been growing out since about .75"-1". They were on bloodworms then transitioned onto Hikari Sinking Gold and market shrimp but since they've hit about the 6" mark, they've slowed down considerably! They're also with some Del's and Senegals but none of them are really taking off in growth. Should I switch foods? I've been contemplating getting them on Hikari Sinking Carnivore/Massivore Delite but it's literally 3 times the price of the Hikari Sinking Gold! Is the Carnivore/Massivore that much higher in protein, etc. to make it worth the cost? Thanks...