How do you solve the problem of too high a box tem...

Hey there, interesting question, but I will tell you what : at that age the plant can tolerate quite high temps and humidity (actually you can even increase yout humidity by covering your seedling!) But what I see is a more dangerous problem. I know you're not directly asking about that but what I can see is that there has been a bit of overwatering and the high temp has caused some kind of root problem probably "water mold" which is what is causing that cupping that looks like heat stress but it's actually root problems not exactly heat stress. For the root problems you want to break down the problem roots with a chelation agent for example enzymes, humic and fluvik acids, amino acids , h2o2 diluted to 0.3-3% or beneficial bacteria.... Do this and keep a strict wet dry cycle if you don't want your plants to die! In the meantime to get the temperature down in the grow room you basically have to pump cold air in so if you use ice bottles don't put them inside put them just before the intake fan. Basically unless the outside of your room is 25C the inside will never be under 27C... So you need an ac or if you want there's a cheaper solution called "evaporative cooler" and you can put that directly inside your grow room. Hope this helps 🚀

Hey brother you could raise those lights to help with the heat stress on those lights . or add in a carbon filter with duct work to expel hot air out of grow box .. my small 2x2x4.5 grow box got the same way also not running 24 hours try 18-20hs .. just my two cents also not putting ice bottles cause some humidity rise but I've never put ice in my tent ..cheers

@Butterflieslittlefarm Hi mate you definately need some form of exhausting the hot air out and vents to let fresh air in If you are worried about smell you can get a carbon filter that goes inline with the exhaust air. You can buy small inline exhaust fans around the 4inch diameter mark would be ideal for you

Put 1 intractor on down in your tent for renew and refresh the air, u can use AC too or more fans in tent ;) Very good diary bro ;) I like Continue the good job 💪