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 Helpful Links: 🐠 Join the Father Fish Shoal Discord channel. It’s a wonderful community to learn & grow. https://discord.gg/father-fish-shoal 🐠 🐠Official Father Fish Merch at https://father-fish-official-merch.printify.me We have t-shirts, hats, bags, and much more! 🐠 Join this channel to get access to perks: https://www.youtube.com/channel/UC_yczBK9HleS-HOFFHtM5Wg/join Support me on Patreon https://www.patreon.com/user?u=25478137 For sales of plants, fish, supplies and more go to https://father-fish-aquarium.myshopify.com/ Father Fish Facebook Page https://www.facebook.com/groups/3244678768912659/ All clips and images are used for illustration purposes only.