09-27-2012, 02:31 PM
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Originally Posted by Brandonl87
So i should do two 48inch 6500k tubes?
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I would advise it, if you can. You don't want too much light, because then it will be beyond the nutrient balance, and algae will proliferate. But over a 55g 4-foot tank, two 48-inch T8 tubes will work fine. Years ago (1980's) I had a single T8 tube over this sized tank, and I just managed, but today i would get a dual-tube, it increases your plant options. Just make sure it is T8 (the regular fluorescent). T5 is very popular now, but this is much brighter light and two tubes is overkill, and unfortunately a single-tube T5 is impossible to find.
The 6500K tubes are good, you can use the less expensive ones made by GE, Phillips or Sylvania. I use these, much less expensive than comparable tubes from fish stores.