Simpte -- that's what I'm wondering, too. I've read a lot of writings/interviews with the Seachem founder about Excel (as well as the FAQs on their site), and he always dances around the "algaecide" topic for legislative reasons. He also states that the reason it affects algae is clear. I wish it were clearer.
As Tom states, though, raising CO2 enough also affects algae. Maybe I'll call Seachem today for some input from them.
Also, Tom, I have a Glosso lawn where the majority of the hair algae embeds in the EcoComplete. I hope I don't have to dig it all up to get rid of it. I already 86d almost all of my Java Moss & Rotala to attack the Thread Algae. |