I'm not sure if they will eat that I know they do sift the sand but I'm not exactly sure what they eat from it. Mine just likes to eat the pellet food and he feeds it to my pistol shrimp. Everything else should eat flake I would think... not sure on the jawfish though. Might want to look into that. As for
pods they grow anywhere and everywhere! I had a hang on back filter before I put the sump on my 29
gal and I used to pull the basket out of the filter to change the carbon once per month. Let me tell you I would pull it out and put in in a bucket of water from the
pwc I just did and there were hundreds at a time. Its kinda hard not to grow them lol