Effect of Calcium on fish health?

Calcium is essential for bones of fishes; with magnesium it causes hardness which also effect the health and growth of the fishes

According to literatures, 80 mg L calcium is not detrimental for trout growth and health, but I am not sure about the eggs and larvae.

Increase in water Ca reduces toxicity of many heavy metals in trout. You may reduce the feed Ca to save money as well

Mr Reza zarei.....

Calcium is an important mineral that should be added in fish diet because Ca help in bone formation, helping to maintain strength, playing a role in the movement of muscles. releasing hormones and enzymes that help with various bodily functions and also highly help in osmoregulation.

The great importance of calcium lies in building bones and carrying out the process of osmotic regulation.

Calcium is an important ion for aquatic lives including fish which plays an important role for body structure and bone formation.

High level of Ca leads the accumulation of Ca in body fluids and tissues hence affecting the absorption of other divalent ions leads various complications as like abnormal metabolism, growth, and reproductive success. studies in this regard has proven that high level of metals environment and food is colinearly associated with respective bioaccumulation. It is suggested reduce the Ca level.

Calcium level like 80mg./l is not at all detrimental for fish growth.You need strict monitoring everyday. During maturity you may increase water level of your test tank and reduce Ca + ion to help in forming fry and fingerling. Calcium is necessary for bone formation and metabolic activity. Blood circulation and platelets has important role in life of fishes. Calcium required for many metabolic activity.

Manju Das Waqas Waqas M. A. Azadi Ahmed Farouk Basuony Abdelhamid Nitesh Kumar Yadav Seyyed Morteza Hoseini Tejpal Dahiya Thank you all for your answers! But I guess I did not clarify the question well. This amount of Ca brings a high amount of hardness (around 246 mg/l). This water is going to be used in a land-based fish farming system! and there might be some problems with the scaling and clogging of the pipes and heat exchangers and so on! So, I guess we should decrease the level of Ca anyway regardless if it affects the fish itself. I know your answers were only based on the effect of Ca on fish which of course nobody gave a concrete reference where it has been tested in a large scale on salmon production (yes Ca has some good effects on the bone and ... but there should be some limits). But more importantly, the fish would also be affected by the level of pH and CO2. This water comes from groundwater and that is why it has a high content of Ca and Mg, and thus a high pH (around 8.5-9.5) which is not suitable for the fish (normally it is around 7.5, more or less)! Now the most important question is if we lower the pH (sort of acidification) then as the same time we are increasing the CO2 level which is not desired by fish at all as we all know. Are there any methods that can be used to decrease the pH to some certain levels like 7.5 and keep the CO2 level to 1 ppm (now it is around 11ppm).

Ok sir

This is water chemistry matter

I am wondering what you mean by 11 ppm CO2?! Free CO2? Or sum of CO2, HCO3, and CO3? Check your method of assay. At such a high pH, free CO2 is very less.

You can remove free co2 by increasin water gas pressure. See Procedia Engineering, Volume 15, 2011, Pages 4780-4789

You may lower ph by acidification to convert all carbonate to free co2. Then use gas pressure.

I guess you should you ion exchanging resin to lower divalent ion levels

If calcium levels get too high (over 500), there is a tendency for alkalinity to drop, affecting the buffering capacity of your water body. Without adequate buffering, pH levels become susceptible to fluctuations.

When calcium level is so much. Stress arise, ranging from lethargy to erratic swimming or growing more slowly than usual.

80 mg/L is ok for Salmon culture

Foliow

Calcium is an essential mineral for fish growth and development, and a moderate level of hardness (around 80 mg/L) is generally considered beneficial for salmon farming. However, excessively hard water can lead to scaling and clogging of pipes and heat exchangers, which can reduce the efficiency of the system and increase maintenance costs.

Chemical precipitation, membrane separation, and ion exchange are all effective methods for removing calcium from water. However, the most economically feasible method will depend on various factors such as the specific water quality, the desired level of hardness, and the cost and availability of different treatment options.

Before considering any treatment method, it is important to conduct a thorough water analysis to determine the exact levels of calcium and other minerals present in the water, as well as any potential contaminants or impurities. This information will help to select the most appropriate treatment method and ensure that the water quality remains within the acceptable range for salmon farming.