Stains

just an advice: don't spray her when the lights are on.. imagine it this way: small drops of water on the leaves act like a magnifying glass under the sun and burn into the outer layer of the leaves.. if you need to spray her (for foliar feeding), do it just before the lights go off, else i suggest watering the medium, not the plant This looks a lot like watermarks. white grain around the base of the plant can be salt build-up from the fertilizer that's being used.. even liquid fertilizer is eventually diluted salts.