Here is the journal for a tank that I started today. It's a standard 5g tank that will be very basic, most likely a grow out tank for cpd fry and OEBT culls. It will be very minimalist in the sense I will only be growing HC in the tank and the hard scape is one carbonate rock. If anyone can identify the specific type that would be great. There was no label at the store I bought it at and it definitely leaches carbonates into the water column. I'm starting off DSM until I get my pressurized CO2 back online.
I was going to say, your water level was way to high. Now, it's still a bit to high but if it's working, it's working.
My advice would, if you only want one rock, to find one about 2/3's the height of the tank. Something with a lot of character is great but anything taller. Even that rock will look about 1/2 inch shorter with health HC.