Hello Tom, Unfortunately I purchased a LOT of ADA fertilizer (Brighty K, Green Brighty Special Lights and the Green Brighty series 1, 2 and 3) before finding information in your forum about the EI method. So based on your years of experience, how would you recommend I fertilize (how frequently/much)? The aquarium has been setup for 3 months, and it’s heavily planted with the following; Glossostigma Elatinoides. Ludwigia Repens. Rotala Macrandra. Bacopa Caroliniana. Hygrophila Polysperma. Cabomba Furcata. Alternanthera Reineckii 'Rosaefolia'. Echinodorus X Barthii I am also currently using over 3 wpg of light, and the CO2 is 30ppm 1 inch from the soil but almost all the stem plants are leggy. So, based on having more than enough light, good CO2/circulation, my only conclusion is I’m either over fertilizing or under fertilizing. Based on the instructions I’m dosing 17mls (1ml per 20l) of Brighty K and Green Brighty series 1 (daily), and since it wasn’t specified in the directions, I’m also dosing 17mls of Green Brighty Special Lights.