Aquatic Filtration Systems What size filter removes algae? June 3, 2026 by pups | Leave a Comment The size of a filter that effectively removes algae depends on the type of algae and the filtration system you’re using. For common pond algae, mechanical filters with a pore size of 25-50 microns can capture suspended particles, while biological filters work on a different principle to manage algae growth. Understanding Algae and Filtration Sizes […] Read more »