Causes, Hazards and Treatment Measures of Abnormal pH Value
1. High or excessively high pH value
(1) There is already a certain amount of algae in the new water, but the water quality is not yet stable and often tends to be higher.
(2) Water bodies rich in blue-green algae often have a pH value above 9.5 by around 5 pm due to strong photosynthesis.
(3) The pH value of water contaminated with alkaline substances will also be higher. Symptoms of fish alkalosis: being stimulated and wandering wildly; A large amount of mucus on the body surface can even be pulled into threads; Corrosion and damage to gill covers, and excessive secretion of condensates from gills; The water is alkaline, generally with a pH value greater than 9; There are many dead algae and dying algal cells in the water.
2. Low or excessively low pH value
(1) The pond water that has been raised for a long time has low transparency and pH value, and even reaches less than 7.5 in the afternoon.
(2) Contaminated by acidic substances. Symptoms of fish acidosis; The body color is noticeably white; Aquatic plants appear brown or white; The transparency of the water body has significantly increased; The water is acidic with a pH value generally less than 4; There are many dead and dying algae cells in the water body.
3. Prevention and control measures for abnormal pH values
(1) Regularly monitor changes in the pH value of water bodies, preferably once in the morning and once in the evening. Once abnormalities occur, promptly identify the cause and take effective measures to address them.
(2) Wait until the water quality is stable for the new water before releasing the fish species.
(3) If blue-green algae appear in the water, it is necessary to control or replace the pool water in a timely manner, cultivate a new algal phase, and apply inorganic fertilizers if necessary.
(4) If the pond has been raised for too long and there is too much organic matter in the sludge, it is necessary to increase the water exchange rate appropriately. If necessary, clean the bottom of the pond and sprinkle some lime to increase the pH value.
(5) When the pH value remains high and there is no other way, it is also possible to consider using non-toxic weak acids such as acetic acid to lower the pH.
