Beautiful tank! I love the idea with the burried PVC pipe! I might to something like that except have in go in one way and come out another . I also see you have a pregnant guppy. Good luck with it
My yoyo loach lives in that pipe. LOL He comes out to feed and bully the cories but he stays in that pipe 85% of the time.
The pvc pipe I have in there is a straight piece with an elbow on each end. The elbows stick up out of the surface of the substrate like hatches. The back "hatch" is hidden by plants and rocks I just wish I had gotten black pipe to blend in with the eco-complete better.