![]() They produce a much more appropriate chemistry than aquarium salt or sea salt mixes. These products are designed to bring your aquarium water to approximately the same chemistry of Lakes Victoria, Malawi, and Tanganyika.Crushed coral will slowly dissolve in acidic conditions, neutralizing acid and increasing buffering capacity. Calcareous sands and gravels can be used to increase pH and buffer the water.Raising pH is much easier than lowering it. Fish prefer a stable pH that is not the same as their natural habitat to a pH rollercoaster as you dump in acid, watch the pH bounce back up, and then add more acid. Thus, as you try to lower the pH of hard, basic water of high alkalinity with additions of acid products, you are actually increasing the TDS, making the water even less like natural soft, acid habitats. Keep in mind that TDS (total dissolved solids) increase with the addition of any dissolved chemicals.You must realize, however, that if you wish to lower pH, and your water is highly alkaline, that is, it has a lot of buffering capacity, then the pH in your aquarium will bounce right back up again, no matter how much of the product you add. You can buy simple acids and bases to lower or raise pH, but most products are buffered to a specific pH. ![]() It is best to use a product that neutralizes both, since water supplies are often treated with them alternately or simultaneously, and no notice is given to customers of such changes. Since municipal water supplies are treated with chlorine and/or chloramine, these substances must be neutralized before the water is added to an aquarium. ![]()
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