06-11-2010, 05:19 PM
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You need to remember my rule #1 of fishkeeping- NEVER trust a worker at an LFS. Half the time they just want to make a sale, and the other half they're just not properly informed.
a 50/50 actinic/10000k bulb is the perfect lighting solution for a marine tank full of corals.
It's also great at growing algae. IT's absolutely USELESS for live plants.
I would go and demand your money back, and only buy fish there from now on (unless you know exactly what you're buying.)
You need to go to a home improvement store (like lowes, homedepot, etc) or a large all-purpose store like walmart or maybe K-mart, and buy a 6500k bulb- with CFLs it's called 'cool white' and with flourescent tubes it's called 'daylight', but the most important thing is to get 6500k-6700k.
Many people here will say that 20W for a 10 gallon is too much without CO2 and heavy ferts, or you'll have uncontrollable algae, etc.
I have 20W of CFL cool white 6500k over my 10gallon livebearer tank, and everything is perfect. No algae, good growth, happy fishes.
Just get the color spectrum right and you'll be set. :) Might also want to get some liquid ferts, but if all you want in the tank is rooted plants (swords, sags, most foreground plants) then the substrate might be plenty- Just a fair warning, the substrate will eventually run out of nutrients and you'll have to get a loquid fert. Luckily you have several years before you have to worry about that.
(Love your sig by the way.)