New 75g Tank Eel Tunnel & Aquascaping Ideas

[FreshyNut]

Recently purchased a 75g to upgrade my 55g. I have a 14" Tire Track Eel that will be going into the tank along with a 4" Sun Catfish who lives in the same cave as the eel in my current tank.
I decided to try and create an underground cave/tunnel for them which i will be burying in my sand substrate. Has anyone ever tried this? Will there be draw backs or issues with this idea?
Any other cool ideas for caves/tunnels for my tank would be great as well! Here are a couple of pictures of what the tunnel looks like.

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[kno4te]

Like the idea of it. Never tried it myself. Maybe surround the opening with some large rocks and sand for the main area of the tank. Should look nice.

 

[Galantspeedz]

how to you intend to remove any waste in the tunnel?

 

[xDestro]

Would be really cool if u could find some clear tubing so you could see what's inside if u have it close enough to the edge of the tank

 

[FreshyNut]

Would be really cool if u could find some clear tubing so you could see what's inside if u have it close enough to the edge of the tank

I looked for clear but it was all really expensive. I was thinking of cutting out some windows in the side of the pipe with a dremmel so you can see inside, but I don't want a bunch of substrate to fall in constantly

 

[FreshyNut]

how to you intend to remove any waste in the tunnel?

I was thinking about that, possibly putting a power head in one end and blowing it out periodically

 

[Galantspeedz]

I was thinking about that, possibly putting a power head in one end and blowing it out periodically

wondering would having the suction placed on the top opening be a better idea using a low powered powerhead...

 

[xDestro]

Maybe just pump water through it during water changes

 

[Fat Homer]

I've done similar before and removed it all after a month or two...

Mainly coz A) sand always finds a way to settle in the tubing, and B) there is always a ton of crap to clean out of then...

 

[FreshyNut]

So here's an update on the 75g. I used the pvc pipe and my eel loves it.
First picture was my original set up, I then decided to remove the front clear piping to open the tank more. Then yesterday I decided to redo the whole setup!