I Tested My Fish Tank Oxygen Levels! Dissolved Oxygen Explained.

Dissolved Oxygen (DO) is one of the most untested water parameters in aquariums — and today I’m testing it with a real DO probe inside aquariums and containers full of leaf litter. If you run a Father Fish–style deep substrate tank, a botanical tank, or a planted aquarium, these results matter.

In this video, we break down:
✔ What DO levels are safe for fish
✔ What happens when leaves and mulm start decomposing
✔ Why DO can suddenly crash at night
✔ How temperature, plants, and microfauna affect oxygen
✔ Low-cost, chemical-free fixes to stabilize your aquarium

NATURAL SOLUTIONS:
• Increase surface agitation
• Add fast-growing plants
• Control the amount of leaf litter
• Improve flow paths with hardscape
• Reduce overfeeding
• Lower temperature a few degrees

This DO experiment reveals how decomposition impacts oxygen—and how to keep your fish safe in any natural aquarium setup.

📊 Want the DO data from the experiment? Comment below!
🌿 More natural aquarium science videos coming soon.

00:11 Intro
00:58 Where does the Oxygen go?
03:12 How do I control the Oxygen?
04:56 What happens to the DO in Natural Aquariums? (Experiments with live tanks)
10:12 DO change from leaf litter.
12:30 Final Thoughts

#Aquarium #DissolvedOxygen #NaturalAquarium #FatherFish #LeafLitterTank #AquariumScience #PlantedTank #AquariumTips #FishTank #AquariumExperiment

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All clips and images are used for illustration purposes only.