bubba kush (photo)

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.

Yeah clear pot is why.