HELP! Plant roots have green fungus/mold around them

Im growing a couple of platinum bubba kush clones, theyve been in veg for like 3-4 weeks now.... i have them in clear plastic 2 liter bottles that had the tops cut off, so i can see parts of the roots. In a matter of a day a green looking fungus has formed around the bottom edges of the bottle... it looks almost like an algae... i have drainage for the bottles is there anything i can do to fix this? my plants still look happy and healthy but seeing that scared the shit out of me.... im looking for expert advice only please, i dont want to kill my plants can i transplant or water with something that can kill this off? I know fungus/algae prefer acidic environments to grow...once again please id love some expert advice asap, love much kushice

buuump, anyone?

I would say go to your local garden store and get some new fertalizer and some peralite. The problem was most likely caused by over-watering and poor soil drainage peralite and sand in the soil should help fix this. Also all u need to do is go to the garden store and ask them what you would need for your plant to have healthy strong roots i knew of a product but i cant remember the name right now, ill try to find it and post later on today or early tomorrow. Good luck.