Discussion Starter · #1 ·
I am wondering how many bulbs I should use for my 90G planted tank with pressurized CO2. right now I am using 4 bulbs of T5HO (4 x 54w). the plants grow fine but the red plants are not red enough and few oxygen bubbles happen. should I add two more T5HO so that 6x 54w=324 w light? Pls advise. thx.