Lighting Help

[Nixon]

Hey guys, I have a 80W Current USA Orbit light and I'm looking for other bulb options but I don't know what will work and what won't. I'm currently running the bulbs the lamp came with (Dual daylight 6700k/10,000k and a 460nm/420nm actinic). One of my friends told me that the 6700 spectrum is going to cause me algae problems (which I have). I can't seem to find any 10,000k bulbs for this fixture (20" fixture). I was wondering if any of these ideas would work:

1) Changing out the 6700k/10,000k bulb to a 10,000k/460nm 50/50 and leaving the 460nm/420nm actinic in.
2) Try tracking down a 36W 10,000k coralife bulb

I would really like to keep it so i have 1 daytime bulb and 1 actinic beacuse I like to have only the actinic on sometimes (looks cool haha).

If anybody has any input or suggestions, any input would help a lot!

Thanks in advance guys/gals!