Originally Posted by loganj
Do you have any idea why the corals grow better under the VHO
? I have heard this before. Just curious if you had ideas why it worked better.
No, I truly have no idea. I know I'm not the first person to notice this. Unfortunately the scientific studies that could solve this mystery are too expensive to perform by the average hobbiest.
FWIW - I've had the BEST coral growth under 250 watt Iwasaki Mercury Vapor bulbs. VHO
is a distant second followed fairly closely by PC
I have a hint (but no proof) that PCs downfall are the reflectors. The 'U' shape makes reflecting the light difficult and the VHO
bulbs I use have internal reflectors. I believe this is VHOs advantage.
Beware claims from vendors.....