The blue bulb is probably an actinic bulb. They don't do much for plants but they are great at highlighting the neon colours on coral and fish, etc. You could leave it if the other bulb provides enough light - if you like the way it looks. I just swap them for other bulbs, myself.
I think I may go that route then! They are less expensive than the other light systems that I've been looking at and it will give me time to check out my light levels to to see whether I need more vs. less! Thanks for the input!
It is too much light for that tank, unless the light is about 30 inches from the substrate - assuming it has a very good reflector. If it has a poor reflector it will be about perfect sitting on top of that tank, for a non-CO2 tank.
I'm assuming it is a crappy reflcetor, I got the light for $65 so I don't think its anything top of the line (I hope lol now that you've said it has to be 30") If by chance it is too much light, can I just adjust my photoperiod or maybe even use just one bulb?
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