In a 20 long you could do a single 250 watt 6500k. It will be very yellow looking but it is the best for growth rates. If looks are your concern, a single 65w of PC
actinic would offset the color, but since it's a propagation tank 250 watt 6500 would be cheap and very effective. You could grow ANYTHING you want!
3' fine sand bed 1x Orange Stripe Prawn shrimp goby, 1x sixline wrassemated pair of true percula clowns, 1x CBS shrimp, 2x peppermint shrimp, 1x pistol shrimp, 1x tiger tale cuke
, ~20+ snails, ~10+ hermits, 1xserpent star.
green Bubble coral, hammer coral (8 heads!) ,various Zoos,green finger leather, green star polpys ,shrooms
175w 10k MH
28w actinic 03
2x maxi jett 1200
Prizm skimmer (modded)
Hagen powerfilter(for running carbon 24/7)
nano arctica chiller