I used to have a 70 gal one for years. They're awesome to look at, very soothing but they're as big a money pit as your project car. I had at least 100lb of live rock in there at $10/lb. anything that looks cool costs accordingly, fish die quite easily so it never ends. Without a word of a lie I had $5000 into this thing before I gave up. There's also all the cleaning involved, etc.
Not saying I didn't enjoy it, just pointing out the dark side of it :D
That is a live rock tank for you. My 300 gallon one, other then the fish that gave up there life to cycle the tank, never lost a fish, other than the 3 that jumped out of it before I made lids for it. Sadly, one of them was the Barracuda.
