This isn't the best designed scrubber but I had to make the most of the materials (and space) that I had. So far it appears to be working. My tank has been suffering from cyano for a few weeks now which is giving me headaches as it never suffered from cyano before. I asume that if my scrubber works it will keep cyano to a minimum? I think cyano has started to grow on the scrubber itself but can someone verify this. The scrubber has been "in operation" for 4 days. This is its 5th day - when the pictures were taken.
This cyano came back 24hrs after the substrate was cleaned. But it gets worse!