Hello, HOLA, I am just venturing into the world of tangs. I went to a swap, and these guys had Altolamprologus compressiceps "Gold Head". I knew what they were from researching tangs and also knew that not very many places even carry tangs around here, let alone A comps. My question is in researching I have read that an adult needs an aquarium of at least 100 gals, but alot of people on mfk keep them in 55 and 75 gal tanks. So obviously the bigger the better, but what does everyone feel is an appropriate sized aquarium for these fish. Also, I did just buy them today, and they are in a 20 gal long and are only .5-.75 inches long. I have tried fry food and frozen baby brine shrimp, but they will eat neither of these. They are F1+ not sure what generation, but I will not have baby brine shrimp for at least 24-48 hours. Is there any thing else I can try?