Don't let a small filter cause big problems. Pond Aerator Filters are engineered for serious pond owners who know that airflow is everything. When your aerator struggles, fish suffer, algae blooms, and your ecosystem goes off balance. Often, the culprit is a clogged or low-quality filter. Sized at 2.25 or 3 inches, this washable polyester filter is purpose-built for small aeration systems. It's easy to clean, easy to install, and built to last-so you're not stuck buying cheap throwaways every season. That means less downtime, less waste, and more control over your pond's health. If your goal is healthy, oxygen-rich water year-round, this filter is your frontline defense. Performance starts here-small part, major impact.