DIY clear "catfish tube"??
Anyone ever built a DIY catfish (or ghost knife) tube?
I'm thinking of taking a 2" diameter, 5" long section of PVC pipe, cutting it in half (making two 5" long half-round pieces).
Drill a few tiny vent holes for water flow, spray paint it dark brown (gravel color), and then glue on the side a scrap of acrylic using PVC glue.
Put this in the gravel, with only the opening at the top. Put the acrylic against the tank glass.
Then, when a fish goes in it, you can see him. Sure, he can see you, but they probably would get used to it.