Hi everyone, I have a vision 260 with discus and have recently added some plants. I dose the tank with pro-fito and easy-carbo. I do not use Co2 at present and have my lights on for 8hrs, though these are just T8 lights with reflectors. My plants seem to grow ok but then when they are getting a fair size the big leaves die off. What is the solution to this and also is the above ferts and lighting ok?