To be honest I dont have a ppm Meter. Nutrients are FloraMicro, FloraBloom, and FloraGro. I have a 10gal res with the instructions followed on label. I am starting to notice the tips were starting to turn orange, at this point i added FloraBloom as per indications. The tips dont seem to be hurting anymore, however the new leaves seem to look a lighter shade of green. I am feeding every 8 hours Is this enough? Will post more pics as time permits.