been runnin this for a while but I keep having temp issues rez gets into mid 70's and soon after ph drops out of control. I have to change rez after two wks or the rot will start settin in.
You are having temp issues with your reservoir because you are running your room too hot. PH drops for one of two major reasons, the first is you are running your nutrients too hot meaning you have too many nutrients. The second reason is something is growing in your reservoir and is most likely my guess.
Here's the thing I can probably coach you through using chemical nutrients and Hydrogen Peroxide full time, can't do that with organic nutrients. But even if I did that why are you going to bother running your lights for mediocre product? Just get your temps to be a maximum of 72F with the lights on and 62F with the lights out and grow some dank weed like you deserve. Or 78F with lights on for C02 and I use 65F for lights off. These numbers you should stick to for your reservoir this is true, but also you need to run the right temps and not pay for electricity to grow you airy, half resinated buds.
If you can't do 72F/62F then do 72F/65F or worst case scenario for no C02: 76F/68F just 76F for plants with no C02 maximum, you are trying to balance the temps so the rez lands at a cold temp.