Pseudomugil Furcatas

[vanalisa]

All new fish should be kept separate in a quarantine tank for the first 4 weeks before being added to a display tank. This stops new diseases being brought into the main display tank.

After 4 weeks, you can move the new fish out of the quarantine tank and add them to the main display tank. If you didn't quarantine the new fish, disregard this.

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If you can sex fish, they can breed.

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You can add salt to the tank with the new fish and keep salt in with them for 2 weeks. It will kill any gill flukes and some external protozoan infections, if they have any.

The dose rate of 2 heaped tablespoons per 20 litres of water is fine for all fish.

"The dose rate of 2 heaped tablespoons per 20 litres of water is fine for all fish".

I meant all fish, not just Rainbows.
And if the salt ratio was the same for all fish

 

[Colin_T]

2 heaped tablespoons of salt (sodium chloride) for every 20 litres of water is safe for all freshwater fishes.

If you just have rainbowfish, livebearers or goldfish in the tank, you can increase that to 4 heaped tablespoons per 20 litres.