Aquaclear 30 Surface Skimmer

Remixed from "Surface skimmer for Aquaclear 20 HOB filter"

Resized the cylinder to accurately slip fit onto my AC30 intake tube. Fixed the floor of the box to print the right number of layers at Cura's default 0.2 mm profile.

At this time it still needs to be tuned for flow. It is definitely skimming the surface already!

Two issues - 1) The water height of my aquarium must be lowered substantially to get this to work. I plan on printing a spacer for my AC30 to raise it up. 2) There are vortices forming off a few of the intake holes that are periodically connecting to the intake, causing the pump to suck a bit of air. I plan on tuning the depth of the box, along with the intake holes to get the flow right.

Update - 10/1/20: I have optimized the design in several ways and also uploaded a spacer for the filter as promised. This spacer is for a 5 mm thick rimless tank. It raises the filter up 15 mm. The tolerance on the slip fit of the intake tube is critical. It is either a b