Hey Goozman. Meters are very essential to any grow, but even more so with DWC (or any hydro setup for that matter). Sounds like you have already come to this conclusion. Temp and humidity meter will help show you what your working with. I have a feeling that you have high temps being that your cab is outside in SoCal. I ran DWC my first grow, and low and behold I got root rot. I soon switched to coco and love it. I am not pressuring you to change, I just see this problem alot when it comes to DWC. Get a small aquarium thermometer (there real cheap at a pet store) and stick it in your res to get a better estimate of your water temps. Not to keep hounding you about having you cab outside, but have you ever thought of putting in your apt? The reason is that temp/humidity in your house or apt is much more stable and tolerable, than outdoors. I have the same cab and also live in an apt, and my cab fits perfectly in my closet. Its not perfectly stealthy by any means, but gets the job done. Not hating on your setup in any way bro, just trying to help you fill those jars up. Good luck, and I will keep an eye on this. Peace.