Leaf problems

that looks like a pest infestation to me based on the sharp edges of the "bite marks" , try adding bacilus thuriengensis to your grow, these are nematodes that can infect the insects and control the outbreak. Hope this helps ! 🚀

Put it under a microscope or use a magnifier to tell for sure. Definitely remove it from the room until you can confirm. Could be spider mites, as they cause white markings on leaves that look like white powdery mildew. If it's WPM it will wipe off, if it won't, it's mites. Either way you can wash the leaves with dish soap and water and make sure to have air circulating over the soil and above the canopy. I don't think WPM will set up unless there's stagnant air and mites don't like breezes, so it's almost the same fix. Sanitizing the grow space wouldn't hurt either to keep it from spreading to others. Good luck

use 1tbsp of baking soda .1/2 tsp of non detergent soap. 1 gal of water. spray once per week

How many times do I apply the dishsoap mix? How quick should I see signs of improvement? Thanks

looks like powdery mildew. you can use baking soda and soapy water to treat it !

Using milk on your compost and in your garden will probably come as a surprise to most. Upon closer inspection, however, it starts to make sense. The amino acids, proteins, enzymes and natural sugars that make milk a food for humans and animals are the same ingredients in nurturing healthy communities of microbes, fungi and beneficial bacteria in your compost and garden soil. Raw milk is the best, as it hasn’t been exposed to heat that alters the components in milk that provide a perfect food for the soil and plants, but any milk will provide nutrition and benefits. Using milk on crops and soils is another ancient technique that has been lost to large scale modern industrial agriculture. Milk is a research-proven fungicide and soft bodied insecticide - insects have no pancreas to digest the milk sugars. Dr. Wagner Bettiol, a Brazilian research scientist, found that milk was effective in the treatment of powdery mildew on zucchini. His research was subsequently replicated by New Zealand melon growers who tested it against the leading commercially available chemical fungicide and found that milk out-performed everything else. To their surprise, they also found that the milk worked as a foliar fertilizer, producing larger and tastier melons than the control group. Recently David Wetzel, a Nebraska farmer completed a 10 year study on applying milk at different rates to his pastures, and recorded the results with the help of the local Agricultural Extension agent Terry Gompert , a university soil specialist, a weed specialist and an insect researcher. What they found was amazing- the grass production was drastically increased; the soil porosity or ability to absorb air and water doubled; microbe activity and populations increased; cows were healthier and produced more milk on treated pastures; the brix or sugar level in the pasture tripled, indicating more nutrients were stored in the grass than before. Grasshoppers abandoned the treated pastures- the sugars are a poison to soft bodied insects as they do not have a pancreas to process the sugars. This also explains why insects will leave healthy, high brix level plants alone, as they contain more sugars than the stressed and sickly ones. Milk Works As Fertilizer. High humidity and lack of air flow. If its a clone it could have already been on it. You can also treat with 2 tablespoons of hydrogen peroxcide a tsp of baking soda a few drips of dish soap to a liter spray bottle. shake well and spray the tops and bottom of the leaves. Do a bud wash at harvest.

Couldn't be less humid in there if I tried lol 😂. And two fans and extractors regularly got doors open for better fresh airflow during the day. So how else could I fix it? Something I can give/do or shall I just remove it if obviously what I'm doing humidity and airflow wise isn't helping?

Excess humidity. Better ventilation and less humidity.