Powdery substance on tent and leaves

Thanks alot guy's

Powdery mildew will kill his grow and he needs to act quickly! There are a few home remedies that work fairly well on his plants: Milk Spray ( 10-12oz per gallon of water, 1:9 Ratio) Hydrogen Peroxide 35% (1 tsp per gallon of water) Baking Soda (“Sodium Bicarbonate” 2 Tablespoons per gallon) or Apple Cider Vinegar (2-3 Tablespoons per gallon of water) These are used as either a spray or surface wipe-down.. He should also THOROUGHLY clean his tent with one of these solutions (for MY money, the hydrogen peroxide is the best and btw, tents should be thoroughly cleaned between harvests)... and then definitely get the humidity under control, and good air flow going. And btw, powdery mildew will NOT go away on it's own so tell him if he wants to save his grow, he needs to act NOW...

Bad air circulation, and too much humidity can cause that if it's not to bad then it can be saved with vinegar with water. Works like a charm. Best of luck 👍

Mildew crank up lights and heat lower humidity