I use Caulurpa Prolifera in all my Algal scruber fuges...Even though most every one will tell you it'll go sexual and contaminate the tank...
I've been playing with the "system" for a couple years, and have found that with 24/7 lighting of 4-5 watts per gallon, I t does not and has not for the past several years...
It grows exceptionally fsat (but I haven't "raced" it against gracileria or chato) anf the nutrient export is at an acceptable and "desired" level...ie: I've found it to be very effective...
I have run various combos of lighting types and bulb temps over it on a couple diferent tanks and am geting good results with PC lighting...I have run "new" 10 Ks as well as 50/50 and 6500k bulbs...
My current setups are using OLD worn out 10K bulbs that probably have shifted to the yellow range as well as a couple 6500ks ...They did god with the new 10Ks and "seem" to be doing "better" with the long expired bulbs...ie: get some 10K PCs and forget about them...no need to change...or use old bulbs from tank as you put newer on display...
I do have an out of date 10K MH setup I've been meaning to try on one fuge...I may have to set that up over the holiday weekend here and then run comparisons against the PCs..Stay tuned...
I should mention this is an old "stock" picture I keep throwing up...When the fuge is ready for harvest...this tank is wall to wall Macro loaded with pods...and then cut back to about half what you see here...every couple weeks...
Other conciderations for effective malnutrient thru Macro harvesting is feeding "raw" tank water from overflow and amount of flow thru fuge...