Swordtail
Xiphophorus hellerii
Males fight hard. A good jumper, so it needs a lid.
Temp 22~28°CpH 7~8.3GH 10~28Adult 10 cmGroup 3+Min. tank 100 L · 60 cm+ longSwims middlePrice $1.43
How many fit in each tank?
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 90 cm standard tank with 6 yourself →Don’t keep with
The same rules the engine uses for tankmates.
Eaten by
Water doesn’t match
Good 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.