HELP! , white film/slime covering my air stones and resivour

So im doing a soil grow and what i do for my water is, first i collect it from the tap then i set the pH to 6.0, add my nutrients then put in my air stones and aerate the water for a day to get rid of chlorine, and when i do bubble/aerate it i have it completely light proof and i make sure that its not too much bubbles due to them popping and leaving white spots above the water, but after leaving the water bubbling for id say 4-5 hours this white film covers the air stones and the bucket. I have no idea what im doing wrong or whats going wrong i thought its maybe from the nutrients but i haven't had this problem in the past it seems to just wash right off after dumping the water but i still do sterilize all my equipment after every time i bubble. Any ideas what it could be? am i mixing the nutrients in a wrong way?

What kind of nutrients are you using? Because if it is a variation of a tea, it is normal for microbial bacteria to make up that slime. I also have read on here about people having that issue in hydro, which can be cured by a little bleach diluted with water from what I recall. Try a search see what your conclusion is, good luck.

When my air stones are not aerating a solution, I place them in a cut off 1 gallon water jug (1/2 full). Add 2-3 tablespoons of hydrogen peroxide on occasion. That keeps them clean. The bacteria build up on them anyway. Don't worry about it. They die and slough off. When air flow is seriously restricted, I switch out for a new stone, and replace the gallon jug. That might take a month.