looking at the levels of nutrients in my TNC and the EI i will be using its clearly been starved of nutrients. so i have upped my nutrients lights are on for 6hrs. i might reduce this? thoughts. co2 seems stable. pressurised co2 with online. 1 hr before and off 1 hr before lights off. nice green on the indicator. so i think i know why this has happened, and a plan to fix it. now do i also need to cut and remove all the affected plant leaves? some would result in non left! suggestions on this please... though one plant has thrived massively.