Okay, I've had my tank running for about 6 weeks and all levels are reading zero. I've got a cleanup crew working including 2 cleaner shrimp and a fire shrimp. I think I'm ready for some livestock. Any thoughts about adding a midas blenny and/or 2 clowns at the same time? Maybe even a starfish or a coral? I'm ready to start adding more animals but I'm usure what direction to go in initially as far as how much to add at once... I still don't know how much a 72 gal can support in terms of total bioload...