The decline of pH in the fish tank may be the problem of water source. Usually, household water is mostly tap water, which has a pH of about 7, and will not fluctuate greatly. However, if the tap water is not used, but other water sources, pollution may lead to lower pH, so we must pay attention to the replacement of water sources.
Ph drop caused by filter material is the most common, and there are many kinds of situations. Firstly, the aging of filter material leads to the release of acidic substances, which requires the replacement of aging filter material, while paying attention to feeding density. Secondly, there are too many filter materials and unreasonable placement, which requires attention to drainage, batch scalding filter materials, and adding coral sand.
Deterioration of water quality is generally caused by not changing water frequently or changing too little water. Although changing too much water will stimulate the fish, too little water will not have the effect of changing water. The water will gradually deteriorate, the viscosity will increase, and even bubbles will be produced on the water surface, and then bacteria will explode. If you want to solve the problem, you must change the water regularly, one third of it every week.
Usually, too much feeding will lead to a decline in water quality, but if the nitrification system in the water body is strong enough, the ammonia nitrogen produced will be converted into nitrate, which will lead to an increase in its content, resulting in a decrease in pH. This requires adding coral sand and reducing the amount of food fed at ordinary times.
