Whether guppies need an airstone depends on the specific conditions of their tank environment. Below is a comprehensive analysis:
1. No Airstone Needed Under Regular Raising Conditions
In an environment with a reasonable stocking density (e.g., 1-2 guppies per liter of water) and stable water quality, guppies can efficiently absorb dissolved oxygen through surface agitation and their gills, so no additional oxygenation is required.
For small fish tanks (such as a 30cm tank housing fewer than 5 guppies), if equipped with a filtration system (like a sponge filter), the bubbles generated by the system are sufficient to supply oxygen.
2. Special Situations That Require an Airstone
High-density Stocking: An excessive number of guppies will lead to a sharp increase in oxygen consumption. In this case, an airstone or sponge filter is needed to supplement oxygen.
Hot Seasons: Higher water temperatures reduce dissolved oxygen levels while accelerating the fish's metabolism. It is recommended to increase oxygen supply during this period.
Ecological Imbalance: Extra oxygen supply is necessary when aquatic plants consume oxygen during nighttime respiration or when other oxygen-consuming organisms (such as shrimp) are kept together with guppies.
3. Precautions for Using an Airstone
Water Flow Control: Excessively strong water flow may shock young guppies or stir up substrate. It is advisable to choose a low-power device and adjust it to the lowest setting.
Noise and Rest: Continuous oxygenation may disturb the fish's nighttime rest. Consider turning off the airstone at regular intervals or using a quiet air pump.
4. Alternative Solutions
Filtration System: A sponge filter serves both filtration and oxygenation purposes, making it suitable for guppy tanks.
Regular Water Changes: Replace 20%-30% of the tank water every week to maintain stable water quality.
In conclusion, guppies do not necessarily require an airstone. The use of an airstone should be flexibly adjusted based on factors such as tank size, stocking density, and water temperature.