This is definitely a topic that people have been split on, even before this post appeared.
I used one in a FOWLR for Tangs because I couldn't keep a Cleaner Shrimp, due to Triggers and a Harly Tusk. It worked for me for maintaining fish health.
I used one in a FOWLR for Tangs because I couldn't keep a Cleaner Shrimp, due to Triggers and a Harly Tusk. It worked for me for maintaining fish health.