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View Full Version : How do I know if I have enough light?



dannonlayne
10-17-2013, 09:10 PM
I just recently setup a 50g tank with an Odyssea t5 light fixture (http://www.aquatraders.com/36-inch-4x39W-T5-Aquarium-Light-Digi-Timer-Fixture-p/52324.htm). Yea, it's a cheaper T5 option.

How do I know if I have enough light? Should I supplement with a couple LED strips?

freedominco
10-17-2013, 09:33 PM
How many bulbs and what's the wattage on them ? Do the bulbs have individual reflectors ?

dannonlayne
10-17-2013, 09:36 PM
2x 39W T5 HO lamps 10000K (on the outsides)
2x 39W T5 HO lamps Actinic Blue (inside of the white lamps)

There is a reflector on each side of the unit but not individually.

freedominco
10-17-2013, 09:56 PM
What kinda corals are you planning to keep? I use to run t-5's and for softies, zoas and most LPS they were fine my main complaint was replacing the bulbs every 9 months. After about 9 months it seemed the bulbs would promote algae growth, at least that was my experience.

dannonlayne
10-17-2013, 10:01 PM
I already have coral in it that I moved from a smaller tank. Mostly zoas, frogspawn, and trumpet coral with a few SPS corals.

I agree about changing the bulbs. I started with a cheaper unit with hopes to upgrade in the next couple years--but I had good luck with my last T5 (in a smaller tank).

freedominco
10-17-2013, 10:30 PM
Keep the sps towards the top and you'll know within a couple of days if they are happy or not

89delta
10-17-2013, 10:32 PM
If I remember correctly it's 2-3 watts per gallon that was the rule of thumb. So the 96w falls into that rule of thumb on your 40B. Downside to that unit and how you have your DT is that the blues are mainly on one side and the whites on the other. If you can take it apart and move one of the blue channel bulbs over with the white and vice versa the coloring should look better.

dannonlayne
10-17-2013, 10:37 PM
Downside to that unit and how you have your DT is that the blues are mainly on one side and the whites on the other. If you can take it apart and move one of the blue channel bulbs over with the white and vice versa the coloring should look better.

I moved them since you saw it! It now goes white, blue, blue, white. And it's a 50g now (the 40B crack was leaking). So that means that 96w is barely less than I need.

dannonlayne
10-17-2013, 10:38 PM
Keep the sps towards the top and you'll know within a couple of days if they are happy or not

I'm newer to SPS. What is the best way to tell if they're happy?

freedominco
10-18-2013, 12:56 AM
I'm newer to SPS. What is the best way to tell if they're happy?

Polyp extension and good color