together. Nitrifying bacteria are usually euryhaline and can coexist with salt, and bactericidal salt usually does not have the effect of sterilization, because salt requires high concentration of sterilization, and the harm to fish under the concentration of sterilization is also great, so it is easy not to soak in salt water. Even at ordinary times, the concentration of salt is less than five thousandths, which can only change the osmotic pressure and prevent the bacteria from entering the fish with the water.
of adding salt to the fish tank? 1. Blocking germs: Usually, after the fish is sick, an appropriate amount of salt will be added to the fish tank, with a concentration of about 0.3-0.5%. The purpose of doing so is to increase the osmotic pressure of the water body, because the water will naturally permeate from the place where the osmotic pressure is low to the place where the osmotic pressure is high, and the germs will enter the fish body with the water. After changing the osmotic pressure, it can play a role in hindering the invasion of bacteria, which is helpful to the recovery of fish.
2. Reduce kidney burden: As mentioned above, adding salt can increase osmotic pressure and reduce water intake. Because of the infiltration of water, freshwater fish need to rely on the kidney to drain water to maintain the balance of water in the body, and after adding salt, less water enters, the burden of the kidney is naturally small.
3. Raising marine fish: If you raise marine fish instead of freshwater fish, you need to add salt to the water. Because marine fish grow in sea water, and the salinity of sea water is relatively high, after entering fresh water, some marine fish will be uncomfortable, or even die immediately, so they need to add salt.
