I'm currently using a canister on this setup, Sunsun HW 704B. I do weekly 70-90% waterchange.Sorry dude . Losing a fish of this type is definitely a loss. I kept one few years back and was a beautiful fish but unfortunately didn't survive. Do have one ansorgii and a congicus going strong.
See that you have a full aquarium with polys, if don't mind please share your filtration setup. The bigger they get more messy the water parameters get
Is that a golden Senegal on the left there? That is such a gorgeous color!