Rusty spots and discolaration of leaves?

Does anyone know what this can be caused by, thanks.

Well something is wrong with your plants. We have no idea because we cant see what they look like. It could be calcium deficiancy but who knows without pictures.

pictures bro

If you have pictures of a leaf and also whole plant maybe youll get some help. Could be ph could be calcium def could be alot without pics

gonna bet you are using distilled water?

Nute build up.

Aids, definetly aids.

Old age causes spots and some discoloration....... pictures please...

Very rare case of cannabis herpies for sure