This is a 3d printed cage that fits around the back end of the Nero 5 pump. Keep your livestock safely away from the back of the pump. This would include fish, snails and anemones.
The first two images are the official version that are sold via my site, and the second two images are the earlier prototype I tested in my tank. Shipping is $6 per package. (I will refund the difference of whatever my website computes!)
The notch for the power cord helps keep the guard in place, and you can still pivot the Nero 5's angle easily in any direction.