Sick plants RSA.

[Marywana]

Can anyone help me. I have an indoor setup for veg stage only. My plants are sick. The leaves are turning brown some yellow. The brown ones dry crispy and fall off eventually yellow ones also fall off.. Some Mother plants leaves are twisting higher up on the plant. I am growing in Coco coir, perlite, and other amendments are rock phosphate, worm castings,cow manure, bone meal, kelp, lime, Mico root, turbo grow (crushed Basalt mineral). I feed ph water +-6ph. I did find my ph metre was out. I have recalibrated it. It is early winter where the day is 23degrees celsius day and 9 degrees Celsius at night. I have 85watt CFL 6500 Kelvin lamps and T5's cool white,I have a rotating fan 24/7 should I switch it off at night, wondering if the cold air blowing on the leaves is an issue. Please can someone advise, I have provided images. Thanks all.

[SirSmksAlot]

Have you checked your ppm? It kinda looks like a phosphorus or calmag deficiency. Also check your runoff ph. Seems you may have a lockout.

[Canuck147]

Cold air blowing ON your plants has dried them out. Move your fan so it is only circulating the air and not giving your girls a 24/7 hair dry.