Now to get to the boring stuff.
Okay the behavior of my fish has changed slightly. It is no longer under that log anymore. But instead is on the right side of the tank. Next to the heater and food box.
It just sits there. One time, I saw it take a round, come back to that corner and go 70 degrees horizontal. I freaked, tapped the glass, and it swam away. It now swims at a slight angle, and when it stops it puts just enough energy to stand still. Using fins, and now tail (before it didnt).
There may be another issue at hand too. The lid for my tank was a DIY project. I used wood and put it together with nails + spray painted it black. Heres the issue: the nails are a tad rusted. And with the bubbles creating evaporation, it touches the wood and may can leak on the sides where the nails are. I cant confirm if that rust water is entering the tank.
I was doing a quick water change. And saw this on the ground
I'm not completely sure if that rust water or coca cola. But It didn't smell like coke. And I usually put my lid there or hanging from the fish tank desk. Thing is, it was tilted vertically for this to happen, but that much wouldn't lead into a tank on a regular horizontally placed lid.
