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Hi everybody, When i first saw a marine aquarium i fell in love!! And bought two of them! First i bought a 50 gal tank, now I bought the glass for a new setup ( about 250 gal) The question: In the small tank the PO4, and nit levels was never low! The salesman of my LFS told me to install...

Yes, the white leds have lenses, 60 degrees, the tank hav about 50 cm deep and the lights stays about 20 cm over the water! Its temptating cause the electric bills stays low, imagine 3 sets of HQI !!!! Thanks for the replay!

I have a 40 w led system with 2 white led and 14 blues. One for each 50 cm, in a total of four sets ( the tank has 200 cm long x 60 cm hi x 45 cm wide )! I want to know if i can mantain hard corals in it, or i will need to use HQI systems?? Thanks Fernando