• Raid on the walls. Help!

  • Whitney

Help me understand what this strange coating is? And how to deal with it?

Joshua9340

This is cyan! Siphon slowly and look for the cause, first do water tests.

Aaron580

Cyanobacteria. When they appeared, I struggled for a long time with various methods. Ceftriaxone 200 mg per 100 liters helped. Apply it at night for 4-5 days, on the first day use half the dose, and after treatment, siphon the substrate.