Okay, time for another update.
The water chemistry has not quite settled down, but it is not nearly as erratic as I was expecting.
As of today:
pH 8.1
dKH 19.0
Ca 120 ppm
I did notice a slight rise in pH, but my lousy test kit (Red Sea) is so imprecise that I can't tell what it's exactly at. It looks a little higher than the 8.0 color, but not quite at 8.2, so I'm calling it 8.1.
I don't know exactly what is happening with the rest of the water chemistry right now, all I can do is report what the test results were...
Also, I was about to add my fish to the tank, but I noticed that the tank looked a bit too empty. It neeed something... ROCKS! Maybe a cave structure, ...and a few more bigger rocks for decoration.... I went outside hunting for some good rocks, when it hit me: why don't I just MAKE the rocks!
So, following the same routine as I did with the background, I made a tall rock, and two smaller rocks leaning against each other to form a cave - all out of styrofoam and then painted over with cement.
I could get some fairly decent pics with my webcam this time because the rocks are mobile so I can bring them in the room, instead of the tank which I can't easily get to from my bedroom.
The tall rock:
The two cave rocks:
Note with the cave, I set the two rocks on a platform for stability. If you look also, the base of the platform is red (or whatever color the webcam thought it was...

) This is to match the lava rocks that I am using for my substrate. There was some leftover "sand" residue in the bottom of the bucket from the rocks, so I sprinkled this over the wet cement to give it its color.
Now... to drain the whole tank so I can silicone these things to the bottom!
