Larval tanks and biofloc systems run at very high densities with little margin for error. A short oxygen dip can kill a whole batch. Suspended nano bubbles keep oxygen even through the tank without the harsh turbulence of strong aeration, which delicate larvae do not tolerate well.
+18.8%tilapia weight in biofloc tanks with pure-oxygen nanobubbles
7.72 mg/Laverage DO with nanobubbles, versus 6.67 mg/L without
+19.5%specific growth rate in a Chilean salmon hatchery trial
Where it is used- Shrimp hatcheries and nursery tanks producing post-larvae
- Biofloc tilapia and shrimp systems in Indonesia and India
- Salmon and trout hatcheries in Chile
- Freshwater fish egg incubation, such as giant gourami in Indonesia
How it works hereIn biofloc, bacteria convert waste nitrogen into protein that the stock eats, but those bacteria need a steady oxygen supply day and night.
Nano bubbles raise and hold dissolved oxygen, which supports the nitrifying and floc-forming bacteria as well as the animals.
In hatcheries, gentle oxygenation avoids damaging eggs and larvae while preventing low-oxygen pockets in the tank.
What the research shows
Evidence from the field
Peer-reviewed studyPure-oxygen nanobubbles in a tilapia biofloc system
Brawijaya University, Indonesia · Chemosphere, 2025
- 56-day trial comparing biofloc with and without oxygen nanobubbles
- Final weight 57.1 g vs 48.1 g, and mean DO 7.72 vs 6.67 mg/L
- Nitrogen conversion rose from 38.8% to 58.5%, so the system needed about a third less carbon to balance the floc
Source: Gymnastiar et al., Chemosphere 384, 144522, 2025 (via AquaHoy) ↗Industry case studyCoho salmon hatchery oxygen upgrade
Coipue hatchery, Chile · 2022
- One nanobubble unit replaced two oxygen cones on an 11-tank line
- Oxygen use fell from 5.4 to 3.6 m³/h and energy use roughly halved
- Specific growth rate rose 19.5% and FCR fell 4.2%; operating cost dropped about 41%
Source: Moleaer case study: Coipue RAS, Acuícola Nalcahue ↗Peer-reviewed studyNanobubble aeration for giant gourami eggs
Indonesia · Grouper journal, 2026
- At 0.6 psi nanobubble air pressure, 83.5% of eggs hatched
- Larval survival reached 94.6%
- Nanobubble pressure significantly shortened hatching time and improved larval survival
Source: Subhan et al., Grouper 17(1), 2026 ↗ Using OxynityHow we set it up for hatcheries & biofloc
- The 1.5 HP model suits hatchery and nursery tank banks
- Feed oxygen at a low, steady rate and keep DO above 5 ppm around the clock
- Use the Oxynity Smart schedule and DO auto mode so tanks are covered overnight
- Introduce nano bubbles gradually when changing an established biofloc system
Good to know: Hatchery results vary with species, tank design and water quality. Start with one tank line and compare against your current aeration.
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