Help with skimmer choice

[gugpuccio]

Hi guys, I wanted to upgrade my skimmer. I own a bubblemagus 150 pro and wanted to buy a coralbox d500 pro. I only have a 21x45 cm sump compartment and I was wondering if you know the exact measures of the skimmer (on the website it states 21x21)!
The tank is a 85 gallon mixed reef with medium bioload (10fishes).
Any alternatives? (Budget xD). I was also keeping an eye on the bubblemagus curve 7. What do you think? Thanks :D

 

[Hitman]

Reef Octopus 150int would be my choice if your budget allows.

 

[gugpuccio]

Reef Octopus 150int would be my choice if your budget allows.

Thanks but It s out of my budget. The coral box is 250euro vs 520 of the reef octopus :(