bubba kush (photo)

Relax, it's okay, it's moss. it is from watering that moss appears on some types of soil

clear pots, light goes in, algae grows. it can play up with your ph. it shows, that you water wrong - pot beeing too moist for too long, no wet/dry cycle. i talked to greengenesgarden recently, he started to use clears because of price, so it works for professionals, i would not recommend it still, especially for starters. less potential troubles - bigger harvests, easy math i think.

The algae will establish a protective biofilm along the inner surface of the transparent pot, facilitating oxygen exchange within the microenvironment and providing a beneficial layer without adverse effects.