We have an aquamaxx 1.5 on our upstairs 40 breeder. Excellent skimmer.
Wife won’t have sump upstairs, you can probably guess why, lol!
I wasn’t that familiar with HOB skimmers, I have always had in sump or external skimmers in the past. All our other tanks have been in basement and always had sumps.
spent about 2 weeks researching and reading online reviews for HOB skimmer. Aquamaxx came highly rated, solid skimmer all around. I have no regrets and would definitely purchase again.
From what I found online, Aquamaxx 1.5 and reef octopus 1000 were both solid skimmers.
I don’t have any personal experience with reef octo HOB but we do have the aquamaxx, aquamaxx is a great HOB skimmer.
Almost forgot to mention, whatever you purchase, make sure it has an option for a bubble stop. Since you won’t have a sump, micro bubbles are usually an issue. Bubble stop attachment will resolve issues with micro bubbles.