Frozen Mysis shrimp is about the next best thing you can feed them, give it a go, they should love it. Soak it with some krill if you want, as that will probably help also. Hikari -Marine A- sinking pellets are great, my fish love them. Hikari also makes sinking Carnivour and Massivoure pellets that are a smash!! The ID's are on the mark also, great looking sveni and belly crawler!! Congrats! Might I add that that Caquetaia kraussi is look superb!! Awesome! Love Caquetaia!!!!