I have an octopus on my 90g and I gotta be honest, while it works I was expecting more from all the hype they get. LOL I still don't have mine dialed in exactly and it's not from lack of trying.
Just an opinion and it's in the minority. But they do come highly rated and reviewed.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.