11-02-2010, 11:35 PM
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IMO it is not too powerful for a 2.5 gal, but it will certainly challenge you to grow plants in that tank and keep algae under control. BTW that hood is a total waste of money. They sell 13 watt Bipin bulbs at 7000K at Fleet Farm for certain and most likely Home depot for about $3. You can also buy a cheap lamp that uses them and tear it apart for a retrofit. I bought a used Azoo aquarium light for my 2.5 gal tank that uses the bulbs. Its worked very well so far, but keeping algae at bay will be difficult. Also its ballast is totally sealed so once that goes the whole thing is pretty much FUBAR and will be scraped for parts. It also has no real socket for the bulb, its just bear wires that you wrap around the pins then push a little rubber tub over them to protect it. IMO I could make a much better quality one myself, but it could not be as sleek as the Azoo one is with its little clamp on goose neck design- its the galaxy light. I also only bought it because it was sold used and was in a working state.