@Colddead It is under section II but I admit it is easy to miss, I'll rewrite the guide so there is an entire section on the chemical sprayer, it has gotten a lot of functionality. :)

To answer your excellent questions here however:

Ethanol: Used in the Chemical sprayer to remove the effects of spores. The idea is there is a hazard working with higher tier plants and that hazard is spores. It's mostly used to remove spores from your crew mates that don't see the warning signs. Spores are quite dangerous and its best to remove them ASAP as the effects get progressively worse the more spores you have. You can see spores with the medical scanner hud or the neurotrauma one.

Oxygen Tank: This one is a bit more situational but it basically removes the "low o2" status effect from crew mates. It basically works like how CPR does for the medic. I havn't tested its usefulness a lot but the option is there if someone is dying to low o2 to keep them alive. It also fills a room with o2 as you use it much like oxygenite shards do.

Hopefully that made sense :)

You can see spores with the medical scanner hud or the neurotrauma one.

Is callend then "Spores something" or how i see i it? I never saw it

Is there no information page for this mod to describe the plant's info? Like, its great and all but if I cant look at something and read its data to understand it, its kinda annoying.

would growing oxygenite plants help with plant spores and gas buildup?
also, what T4 plants are there? or are they not yet implemented?

How do you unlock the Chaos Seed recipe?