My water parameters are Ammonia 0.00 PPM, Nitrate 0.00 PPM, and Nitrite 0.00 PPM. My pH is quite high, at 7.3. I have a pool filter sand as my substrate, no CO2. I have a 156 watt t5 lighing but only use 2 bulbs which brings it to 78 watts. I do dose fertilizer and plan to use root tabs on if...