I'm not sure if this is due to compost thats inapropriate for seedlings, as last run I had probs on 2 plants that seemed similar to this but not as bad, or if there is something else going on. Grown under cfl lighting so far, small seedlings, watered at ph7, the natural ph of tap water here, no food other than whats in the compost. Can't see any pests other than fungus gnats, this is their family home, theyve been here for years and never really done any noticable damage. Can't see any other pests. This is the uk, so its pretty humid constantly, temps have been on the low side, but not as bad as they were in the winter, distance from the light source is fine. I can't think of anything else to add here, so Q's or guesses apreciated.