You should add a cheap drop checker to the tank just to satisfy yourself that you really do have at least 20-30 ppm of CO2 in the water. Read the threads here that discuss this.

I suggest lowering the lights closer to the water. The AH Supply reflectors aren't really made to allow the light to be way above the water - you lose a lot of light that way. You are dosing basic EI - I assume that means phosphates included? Some people still seem to believe they can omit phosphates.