Any day now I'm going to be getting some T5 lighting in the mail. It has 2 daylight, 2 actinic bulbs. At the moment I have one frag of surviving SPS from the tank upgrade. Its managed to hang on and grow under PC lights and no Kalk additions which is somewhat of a miracle. Its a 75g with mostly softies, LPS, and BTAs. I would like to add a couple of SPS to the tank and I'd like some opinions on the hardiest/fastest growing. I really am hesitant towards dosing Kalk since it all just looks like it has the potential to be a big mess. If anybody also has economical suggestions towards simple kalk dripping procedures that would help me also as I know I'll need it eventually. Thanks in advance!