Leaf tips and edge brown and crispy

Titian Flo n Gro
4 600w
temps have been shit lately low 57 night once and max 83 day getting it under control. Usually 75-77
humidity 85% night day 25% (shit too)
Ph 5.5 to 6.5 stable swing during the weak before res change
GH micro 10ml per gal
GH grow 20ml per gal
Just added flroa blend 10ml per gal on res change thru day. (this just started after adding this, but temps have been crazy too.)
ppm 1130
23 days into flower
5ml H202 per gal
50 gal res.
air pump for res running every now and then
6inch intake from house
8inch with filter for exhaust


I am using the ph drops for testing they suck, getting a digital tester tomorrow

get that hum down. anything over 65% and u run the chance of mold.

Okay will work on that today.
Oh yeah another bit of info woke up sat and checked the ladies, found they had not drained pump sounded like it got airlock.

Humidity between 40-60% all the time. 25% is crispy and 85% is moldy/fungus/bug-inviting. But also a grow room pic would help rather than just the obvious plant damage.

Is it to much stress on the plants to run the 16inch wall mount fan 24/7? Or should it be off at night?
Its running now with the lights off and humidity is staying around 45% with lights off

i run my fan 24/7 grow in my sig

Does this help? lights are off right now.

They look perfectly fine in that picture too! I think just the humidity should do the trick. Everything else youve listed is within ranges and optimal.

Iam feeding every 4 hrs for 15 mins. Could under watering cause leaf tips to turn brown? should I change to every 3hr and 15 mins.