Layout change
It seemed to me the aquarium plants were overgrown. In December I decided to change the layout. I took out a lot of plants and moved the black sand back layer to the front. I still had rest of that black sand. So, I added it there. I sorted out the plants and put them in different places and as a result the aquarium was more illuminated. The plants in the front were moved more to the center or back. To the front I bought the Echinodorus tenellus plant.
Concerning the fish, currently I have four Angelfish (Pterophyllum scalare) that remained. The oldest is from 2016. The same for the Ancistrus. Only one remained. Also, from 2016. The other died. Then three Siamese algae eaters (Crossocheilus siamensis), Cardinal tetras (Paracheirodon axelrodi) and Serpae tetras (Hyphessobrycon eques).
Preview of picture in folder 03/2023