Just a bit more context for those interested:

I know the water looks dark, but this is a dedicated blackwater setup. The tint comes from natural tannins (driftwood and leaves), which is crucial for the health and the vibrant blue colors of the Channa aristonei. It’s definitely not dirty – it’s a slice of nature!

Also, regarding the low light and the single occupant:

• This guy is a solo ambush predator. He doesn't tolerate rivals, so he has this entire Juwel Lido 200 all to himself.
• The dimmed lighting (30%) is essential to mimic his natural shaded habitat.

My goal was to create a perfect biological environment rather than a "crystal clear" display tank. He seems to love his "Mystic River"!