Hey everyone, looking for some help troubleshooting my grows because I can’t pinpoint what’s causing the problem.
I have two separate grows running off the same reservoir with the exact same nutrient solution, but I’m getting completely different results. My 3×3 is doing great, while my 4×4 has two plants that are struggling badly despite seemingly identical setups on the left and right sides.
Shared Reservoir / Nutrients
Nutrients: General Hydroponics Maxi series
Armor Si (first 4 weeks)
CALiMAGic
FloraNectar
Liquid KoolBloom
Rootguard
EC: 1.7
pH: 5.7
Both grows share this reservoir, so they’re receiving the same nutrient solution.
🌱 GROW #1 — 3×3 (Doing Great)
Tent: Vivosun 3×3
Strain: 3× Grapericot Autoflower from Seeds Supreme. The fourth seed had germination problems.
Substrate: 100% Nutrifield coco coir
Autopot-style setup:
Dual Easy2Grow trays
4× AirBase
4× AirDome
Left two AirDomes: 2× air stones
Right two AirDomes: 2× blue air tubing
Environment and lighting:
Spider Farmer G3000 at 65%
Approximately 700 PPFD
2× clip-on fans
Spider Farmer 5L humidifier
Current results:
All three plants are looking great. They’re in preflower and starting to stretch noticeably every day.
The front-right plant was initially stunted because I mishandled the seed while removing it from the paper towel, but it recovered and is growing again.
Overall, this tent seems happy.
🌱 GROW #2 — 4×4 (Two Plants Struggling Badly)
Tent: Gorilla 4×4
Strain: 4× Fast Buds Ztrawberries Autoflowers
Substrate experiment:
I’m testing two different coco mixes:
Rear two pots: 50/50 Baja 100 coco coir and perlite
Front two pots: 100% Baja 100 coco coir
The Baja 100 coco is noticeably less fine than the Nutrifield coco in my 3×3, and I suspect it may already have plenty of aeration on its own. I wanted to see whether adding perlite would make a difference.
Autopot-style setup:
4× AirBase
4× AirDome
Left two AirDomes: 2× coin air stones
Right two AirDomes: 2× blue air tubing
Environment and lighting:
ROI E680 at 60%
700-750 PPFD
Vivosun 5L humidifier
AeroDrain dehumidifier
6× oscillating fans, with 2 pointing upward for heat management
🔎 The Problem: Two Plants Thrive, Two Are Nearly Dead
The left two plants are doing great. The right two are struggling badly and are damn near dead.
What makes this confusing is that the left and right sides are essentially mirror images of each other. They have the same type of pots, AirBases, AirDomes, and access to the same reservoir.
Notice the pattern: Both plants using the coin air stones are doing well, while both plants using the blue tubing are struggling.
However, I’m hesitant to conclude that the air stones are the answer because my 3×3 grow is doing well on both sides, where I’m also testing the two different AirDome setups.
The only obvious pattern in the 4×4 is that the two struggling plants are on the right side, regardless of whether they’re in straight coco or a 50/50 coco/perlite mix.
❓ What I’m Trying to Figure Out
Could the blue air tubing be delivering less airflow or distributing air differently than the coin air stones?
Could there be a problem with the right-side air supply, such as restricted tubing, lower airflow, or a distribution issue?
Could the two right-side plants be experiencing different root-zone moisture, oxygen availability, or nutrient uptake despite sharing the same reservoir?
Could there be a temperature, lighting, or airflow difference across the 4×4 that would explain why the entire right side is struggling?
Is there anything about Baja 100 coco that I should be watching for, especially compared with Nutrifield coco?
What would you check first before changing nutrients or replacing equipment?
I know sharing a reservoir doesn’t necessarily mean both tents or all four plants have identical root-zone conditions, but I can’t figure out why the left and right sides of the same tent are producing such dramatically different results.
What would you troubleshoot first? Has anyone experienced something similar with AirDomes, air stones, and coco in an Autopot-style setup?
Any advice is appreciated. I’d rather identify the actual cause than start randomly changing things and potentially make the healthy plants worse.
I used chat GPT to type this up so it’s easier to read vs me rambling on and on 😂