after a little research
How to cure:
The concentration of mineral salts should be altered to suit a particular species. If osmotic shock occurs, this concordance should be exact and it should be established immediately. Newly-purchased fish if they are obviously affected should be transferred to the aquarium with appropriate chemical composition of water (for example, into a quarantine tank, where they should be kept for some time). Changing chemical composition of water in the main aquarium can cause osmotic shock in fish already living there.
Then change water in the quarantine tank so that its characteristics coincide with those in the main tank. This is done gradually, within 2-3 weeks. Only transfer can newly-acquired fish be transferred into the main aquarium.
If fish suffer from osmotic stress the concentration of dissolved salts should be changed gradually, within 1-2 weeks, so as to avoid osmotic
How to cure:
The concentration of mineral salts should be altered to suit a particular species. If osmotic shock occurs, this concordance should be exact and it should be established immediately. Newly-purchased fish if they are obviously affected should be transferred to the aquarium with appropriate chemical composition of water (for example, into a quarantine tank, where they should be kept for some time). Changing chemical composition of water in the main aquarium can cause osmotic shock in fish already living there.
Then change water in the quarantine tank so that its characteristics coincide with those in the main tank. This is done gradually, within 2-3 weeks. Only transfer can newly-acquired fish be transferred into the main aquarium.
If fish suffer from osmotic stress the concentration of dissolved salts should be changed gradually, within 1-2 weeks, so as to avoid osmotic