i have yellowing perlite:
i think this is due to no ventilation/air movement so the pots arent drying out quicker... ive only used a very weak nutrient solution during the transplant, then it dryed out nice after a week so i watered it with plain distilled water and that all sounds fine to me, i believe it would be from either:
-the salts in my water - which shouldnt happen becuz im using distilled water
-over feeding- which clearly i havent done
-not enough airation - which i suspect
(sorry i stole this out of my current thread, no one answered n i was lazy, but i have no fans, just 3 walls and piece of board i put across for the 4th wall, im changing this soon i know all about ventilation and all that, but curious cuz it has happend before and it was a similar situation with no ventilation, i belive it happends when its watered aswel)
ANY COMMENTS!?