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Man, that reminds me of being a teenager again. Staring at the plants in a makeshift grow room.

What Ill_Even said, plus tell your brother to stop watering so much. Fungus gnats love wet top soil, he needs to let the soil dry out at the top before watering again. Yellow sticky traps are one of the best things to get ride of and prevent fungus gnats. To get rid of the fungus gnat larvae, you can mix up a hydrogen peroxide and water to make a 1% hydrogen peroxide mix. Pour it over the top layer of soil, you really only want it to soak in like 2cm into the soil, so don't over water as it will kill pretty much all microbes in the soil. Do this every 2nd day for a week, then you can introduce microbes back into the top soil with any microbial blend. I wouldn't recommend growing with the tent open and access to outdoors, it will attract everything from fungus gnats to thrips, aphids, spider-mites, etc and completely defeats the purpose of growing indoor because you are still subjecting the plants to outdoor stresses (like bugs).

I also had a fungus gnat issue on my 1st indoor run - I switched to bottom feeding/watering to keep the topsoil dry. (plus, I could see exactly how fast my plants take up water - I still water manually, been doing it ever since.) The few bassas that get in at the start lay eggs and the larva stays in the soil until they mature and then repeat the cycle. All in all, fly traps as the guys mentioned and getting that top layer dry and after that expect to see the larvae that matured buzzing around, at this point if there are any wet soil around, they will repeat that cycle. It's a bi-atch, but winnable.

Thanks for the reply guys.

100% I would cover the tops of your soil/pots with yellow insect sticky traps and just try catch as many of those buggers as possible.

It got better then it got way worse. Is it because my brother waters the plants then has the tent open for hours at night with the bright light coming out with a sliding door lending outside right by the tent? is this attracting them? It seems it be getting worse even with neem spray its not a closed environment as my brother likes to leave the tent open and just to stare at the plants for hours not sure if this is a good idea what you guys think?

Wouldn't worry about it if it's just on a bottom leaf or two, but I'd clip it just in case it's fungal.

Lower/older leaves. Calmag?

Help needed. This is only on one plant

The gelato is bringing the purple with some thin leaves and PM[emoji20] The orange mimosas have lekker fat leaves, one next to the gelato with no pm and another on top They seem a lot hungrier Sent from my iPhone using Tapatalk

Same. Was like looking into the future of a crystal ball.