I am currently setting up a 200 gallon system and wanted to build a pvc structure for an eel I bout 2 inch pvc but is this large enough or should I get bigger? Also how big if a pvc structure should I make for him? I was thinking a U shape the goes against the back of the peninsula (36 inches) the extent out along the sides a bit to should I make it with more entrances ... maybe. a T fitting in the middle of the long piece running along the wall? any suggestions are greatly appreciated