These are the fertilizers I have: 1. Plant Premium Nature Gro AZOO (8.45 fl. oz.) 2. Sera Florenette Root Tabs (50 tablets) Directions: 1 tab for every 5 gal every 2 wks. 3. Sera Florena Liquid Fert I have a 40 gal planted tank with mainly Hygro Corymbosa, Ludwigia, and Sagitaria. I have 4 LEDs each 10 watts. The height of the tank is 40 cm. Please help!!!!!