I have been pretty impressed with the 3D backgrounds I have seen on this site (and others) and I plan to do my own sooner than later.
One of the things I would like incorporate into my BG is something I am calling a "functional cave". I actually want a few, if they work...
The idea is to make a cave out of plastic pieces (cd cases, plastic bottles, pvc, etc) and then cover it up with concrete so it looks like natural rock. The functional part would be the built in ability to almost completely fill the cave with air (and drain it). I also wanna flush the cave with a rush of water to move whatever crap thats building up in there and get it out into the tank so it can be filtered.
I did a quick little graph drawing to show what I mean.
The red is the power head entrance which would have a screened tip so nothing can escape up the tube.
The orange line is airline tubing that goes from the highest point of the caves interior and exits out the top of the tank. This would have a valve at the end above the tank someplace.
The green is an air stone attached to an air pump.
Oh, and the blue is the actual structure (concrete).
On the left is front view. the black boxes are supposed to be entrances. i was gonna have two entrances into a single inner chamber
The right is a bisected profile view with the back side to the right and plumbing behind it.
Now, I had primitive set up like this in my old tank and it worked to get my eel to actually leave his cave when i wanted him to once in a while. Im sure it pissed him off too so i rarely did it.
I plan to bench test this system and then do it on a larger scale in my 130.
I'm wondering what you guys think and if anyone has done anything like this.
As always, all comments are welcome and thanks for any replies...