I bought an EcoQube C+ (3 gallon aquarium/aquaponics system with a built in spot for a few small plants) from a discount deal of the day website (after their Kickstarter imploded…and somebody offloaded the product). The model I got was the EcoQube C+ UV, which has a small box containing UV LEDS just after the pump, that supposedly keep algae and other bad stuff from growing in the water.
Of course, it didn’t come with the plant growth medium that you are supposed to use in the four little baskets, so I bought some coco hanging basket liner and used a small strip of that in a loop to hold some perlite in the basket to support the roots of some sweet mint.
I noticed that the water was evaporating relatively quickly, possibly due to the large opening at the top. You used to be able to buy a glass cover for the 2 gallon EcoQube C, but it was out of stock, and probably wouldn’t fit the C+ anyways, so I decided to make my own out of 1/8″ clear acrylic.
This view with the protective paper still on the acrylic lets you see how it fits over the tank, and the following photo shows what it looks like when the protective paper is removed.
If you have access to a laser cutter, you can download my .SVG file to make your own: ecoCubeC+cover.svg
Or find it on Thingiverse: https://www.thingiverse.com/thing:4924825