Winwood
New member
Let me just say I like formula pellets, especially the smaller ones. I find most fish take to them fairly easy. That being said, in all my tanks that I feed formula two pellets, there seems to be a collection of bluish green effluent out of all the skimmers. Anybody know what this coloring agent might be? Spirulina? Artificial coloring agent? Something else? For the record formula one pellets do not produce this color of effluent.