Mike-words
Aquarium Advice Freak
- Joined
- Jan 13, 2011
- Messages
- 271
For the MH if you want it bluer you could try those color gels that are used for theater lighting they will also dim the light a bit if that's an issue. Some of those setups have them only a few inches from a 500+w bulb with no heat shield. I plan to use them ( difusers almost the same) to acclimate new corals ( when I get them).