its just a few metals and chlorine in the water as some distiled water isnt that clean some poeple think boiling water thats cooled down is the same its not distiled is evaporated or if it was bottled water then read whats in it as you will be amazed at how much difert metal minrals and such are in them i distill my own water from rain water it works well and no yellow perlite
chewbacker Reviewed by chewbacker on . Perlite turning yellow!? HELP! Hi guys, I just took out my 4' florecents and put in a 400 watt MH. A good part of my mix is made from perlite and is now turning yellow on the surface. Plants are 16" away from the bulb and it is NOT hot to the hand. Is the bulb to close to the plants? Don't want to burn them. Oh, I transplanted the plants last night into 2 gal containers. Is this normal for the perlite to change yellow? I think the lights are to close...I dono. Room is well vented and is around 80 degrees. Rating: 5