HELP me help my mate so he stops calling me

[Frankyboy]

Hey fellas need some help identifying what’s wrong with my mates plants he had 4 in veg state then they just started looking shit, yellow dark marks on them and all 4 were identical he got rid off them as I gave another 4 healthy ones ad under a week they look like what’s in photos.
was there today, temp in yet was 22,ph just undetr 6 but he has been fighting it abit the ph levels abit and his nutes are fine.

I had a thought could be way off, he is running a cooltube but noticed he is sucking the air for cool tube straight from inside of tent at bottom then going out top,

 

[HGO]

corona virus

Nah just joking looks like it could be rust fungus but hard to tell with lights on

 

[Frankyboy]

Rust fungus what can cause that?

 

[OMD]

It can be caused by high humidity and lack of air flow in the tent. Cut the most effected leaves off before it spreads more.

 

[HGO]

sulfur based fungicides can work but don't use it if in flowering makes everything taste like

 

[Frankyboy]

It can be caused by high humidity and lack of air flow in the tent. Cut the most effected leaves off before it spreads more.

Yeah I was thinking last night as he is using a cool tube but only sucking air from inside the tent down the bottom and passing over tube then out the top so he may be taking too much of the good air out by doing that ?

 

[HGO]

Ideally you want to be exhausting the air from inside the tent out of the room the tent is in rather than just recirculating the same air
Good airflow is key to a healthy environment

 

[Defsnotacop]

Vent the air out of a window or something if you can.

 

[Frankyboy]

Ideally you want to be exhausting the air from inside the tent out of the room the tent is in rather than just recirculating the same air
Good airflow is key to a healthy environment

Yes I understand that what I am saying is he is sucking air from down bottom of tent passing through cool tubes then out the top and not much air coming through tent so and good air sneaking in he would be sucking straight back out no passing past plants like usual when you suck air out at the top

 

[Deleted member cpr]

Yes I understand that what I am saying is he is sucking air from down bottom of tent passing through cool tubes then out the top and not much air coming through tent so and good air sneaking in he would be sucking straight back out no passing past plants like usual when you suck air out at the top

I think I understand. Both the air inlet of the tent and inlet of the cool tube are at the bottom of the tent? That could make stuff a bit stagnant i suppose, if the fresh air doesn't do a lap around the tent before it's chucked. Path of least resistance and all that. Could he bring air in from the top?

 

[Frankyboy]

All he done was take the ducting that connected to cool tube and just dangling in the corner near ground inside tent and put it through 1 of the many holes in the tent.
not sure if hehas but I told him to put a fan at top (like normally do in bigger plants ect) which as we allknow bring fresh air in at bottom sucking. Up past plants and out the top with all yuck/hot air.

thanks for the responders