i've kept halimedia in my 1.5 for... about 5 months now. it grows quite well with weekly 20% water changes and i currently have to break off and take out pieces.
Hey! Thats very nice. I have never had much luck with halimeda, tried everything from light fertilization w Fe to steady lighting and calcium support. It just goes to show how many unnamed variables there still are in the hobby of nano/pico reefing, even when it seems we've got it down pat.