I’ve read mixed reviews on both. It seems the guy who created SLF 100 is a bit sketchy, IE he refuses to tell anyone what is in it and some people think he just rebrands another enzyme product as SLF. I’ve also read that Hygrozyme has been giving people issues with slime, but there isn’t definitive proof. There isn’t definitive proof on either claim. What I have found out is SLF 100 is sugar based, but Hygrozyme is not.
I’m going to give Hygrozyme a shot, I’m looking for something to help reduce/prevent buildup in my reservoir and bubbler. Think I have narrowed it down to being one of the issues I’ve been having with my seedlings after their first feeding.