HOW to increase alkalinity and hardness what can you add to the water and how much for farming with tIlapia?

To increase alkalinity in water for tilapia farming, you can add sodium bicarbonate (baking soda) or calcium carbonate (lime). A common recommendation is to add about 20-30 mg/L of sodium bicarbonate to raise alkalinity, while calcium carbonate can be added at a rate of 50-100 kg per hectare, depending on the current water conditions. For hardness, you can add calcium sulfate or calcium chloride, typically around 20-50 mg/L to achieve the desired levels. Always test the water parameters beforehand and adjust based on specific needs.