I'm sorry to hear that your plants are struggling! Let's try to figure out what's going on with your Bubba Kush.
Yellowing leaves can be a sign of a few different issues, so we'll need to do a little detective work to narrow it down.
First, let's consider your watering and nutrient regimen. Are you watering your plants too much or too little? Overwatering can lead to root rot and nutrient deficiencies, while underwatering can cause stress and nutrient lockout. Also, double-check your nutrient levels and pH to ensure they're within the correct range for your plants.
Next, take a look at your lighting setup. Since you're using Mars Hydro TS3000, it's a powerful light, but make sure it's not too close to your plants, causing light burn. Conversely, if it's too far away, your plants might not be getting enough light.
Check for any signs of pests or diseases as well. Spider mites, aphids, and other pests can wreak havoc on your plants, while diseases like powdery mildew can also cause yellowing leaves.
Lastly, consider the age of your plants and their stage of growth. If they're nearing the end of their lifecycle, it's natural for them to start yellowing and dying off.
Once you've assessed these factors, you can take appropriate action to address the issue. Whether it's adjusting your watering schedule, tweaking your nutrient regimen, or addressing pests or diseases, hopefully, you can turn things around for your Bubba Kush. Good luck!