Aquariums & Fishkeeping Why does my fish tank have so much biofilm? March 3, 2026 by Myaya | Leave a Comment Biofilm in your fish tank is a common occurrence, often appearing as a slimy, sometimes cloudy layer on surfaces. It’s usually a sign of a healthy, established ecosystem, but excessive amounts can indicate an imbalance. Understanding the causes and how to manage it is key to a thriving aquarium. What Exactly Is Fish Tank Biofilm? […] Read more ยป