Giesmann are good bulbs as well. The Actinic plus is about the same as the ATI Blue+, I can't remember what they call there bulb that is about the equivalent of the Aquablue Special, but they do have one. I don't think Giesmann has a bulb that would equate to the Purple+. I would suggest running one of these as it really helps your reds pop. IMO the tank looks "washed out" with out a purple bulb in the mix.