ihad one of my sen bichirs die and i couldnt find it for a couple days...nasty business..i had one of those big,fake cypress roots with the hollow hole up top,an one of my sens like to hide in there ,well i got busy for a couple days and didnt pay attention too it besides feeding, well when i got time i noticed i was missing a fish, looked all over.in the tank, around it ,under it every where. wellit was buggin the hell out of me so i started tearin down my tank, took every thing out checked gravel everything, started puting everything back and when i was lifting one of the roots back in cus i have a big tall tank on a stand i had too lift it by my head and got a big wiff of something nasty so i washed it,scrubed it jst in case some bacteria wasnt maken the plastic stink,still the stinkit didnt help,so i was washing it again and i felt something rattle in there ,looked in the cave hole thing in the root wad and seen part of a white tail,it was one of my albino bichirs come too find out the cypress root stalks are hollow he must of swam down one when he was hiding in the hole and couldnt back himself out and drowned..nasty nasty business..atractive set ups i bought them from petsmart or petco dont member which so heads up..if ya pick one up and own a bunch of young bichirs..