Hello! This is my first time growing. I have three baby plants (all of them auto, different strains) in the same indoor environment (light, soil, temp, etc.) One of them is healthy and fast-growing. Another is healthy too but it grows way too slowly. And the third is OK but leaf tips are light green. Yesterday I noticed slight invaginative deformations in these areas and today I saw that they turned yellowish-green. I have CFL lights which isn't too close to the plant so I don't think its light burn (just as I reckon)