There was plenty of red on the rocks and more porous than I expected. I'll definitely get more from them. The rubble rock will work great for fragging!
No, I had to tear down an old server laying around the house! It's just taking up space anymore anyway.
I'm concerned because I only run my MH for about 2 hours a day right now. I'm trying to figure out what temp i'm going to be able to keep the tank. A stable temp anyway.
The back has always been open. There are a few other openings that are letting heat out.
The heat in the tank has held steadily at 79 so I'll have to see what happens when the lights are on longer.
I'm starting to see a diatom bloom so I guess that a good sign. Although, my nitrate and nitrite are off the charts. I'll have to do another water change tomorrow.