After months of neglect decided to put some maintnence into my 20 gallon high tank with 2 loaches and 2 SAE's.
The strips are algae free spots to stress how much algae was builtup on walls.
Halfway through draining tank, all of algae on tank walls removed, java moss mountain gone, and driftwood removed.
How tank looks now, want to add more plants and save a little red ludwiga leaf that survived the neglect. Also, water is a little cloudy after water change (3 days passed). Will update progress.