Plant falling from the water weight.

OK, this is a two part answer. RN mean Right Now. its an abbreviation. First things first. that insect is known a black thrip. they are pest and you will want to treat them asap before they start to stress out your plant. https://gardenerspath.com/how-to/disease-and-pests/control-thrips/ This is one reference point from googling I found that goes into details about them and how to control them. There are lots of products on how to treat them, your in veg so you can use a lot more then if you where in flower. the 2nd half of this is the plant falling over. It's doing this because the stem is to weak. You need to add in air movement in your room to help strengthen it up. I see you have fans going maybe lower one down a bit more, It could also just be this seed like you where saying at the other ones are fine. Seedlings also stretch like crazy if the light is not close enough. Thus making them top heavy. Supporting it like you have is a good idea, let it thicken up. Don't point the fan directly at it. Point it at a wall in the tent to make some diffused air movement. The plant will bulk up its stem and become very strong to the point it will no longer require its supports and they can then be removed. As for spray the plants try not to do this. Wet leaves that close to the medium can cause some issues and increase the chances of powdery mildew. If the small top layer of soil aorund the plant is dry but under it its wet, you don't need to worry the plant has lots of water and its root system is already as deep as the plant is tall. If you have any other questions use your DM feature. you inbox is the green arrow on the bottom right hand side of the screen. No one gets notified of a reply in this question section of the website, so we don't know if you wrote us back even if you use the "@" tag on their name. Best Of Luck and Happy Growing!