From brackish waters, so it needs hard, slightly alkaline water. In a soft-water planted tank its fins won’t spread.
The largest group where none died in 90 days. Tap water · coral sand · bacteria starter on day 1 · fish added on day 10 · 25% weekly water changes.
It likes hard water (high pH and hardness). This was calculated with coral sand to harden the water.
Run a 60 cm standard tank with 6 yourself →The same rules the engine uses for tankmates.
No eating or bullying either way, with plenty of overlap in temperature and pH. Fish that swim at a different level come first.
The numbers on this page come from the Water Kiwoogi simulator model; real tanks can differ.