Not sure how high you have the light above the tank, but if shortening the photo period/raising the co2 doesn't help you could try raising the light. I had to do that with the t5ho i had on my 29g. The t5's put out a lot more light than other lights. Your dosing of ferts looks good to me though, with regular waterchanges. Might try dosing CSM+B the times a week as per the EI method which it seems like you are doing. That is what i do with my 55g anyway, with no ferts on the wc day. Tank looks great though! Keep up the good work!
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