The photos are from my ten-month-active invertebrate quarantine tank. I've been assuming the dark red stuff on the rocks (and snail shells and return nozzle) is coralline algae; it's been increasing for awhile now. The pink stuff on the frag plug and the shell is new. Is the pink stuff cyano? Am I correct on the red stuff being coralline algae? I've started moving critters from my quarantine tank to my display tank and would rather not move anything evil. Thanks!