May 03, 2021
Nigerian Catfish Farmers
Sudden changes in pH can stress or kill your fish even when those changes occur within a pH range they normally tolerate.
Catfish fries, fingerlings, Juveniles and grownout are very sensitive to sudden increases in pH.
Catfish fry acclimated to waters with pH near optimum (pH 6.5 to 7.5) can withstand sudden transfer to water with pH in the range without being killed.
However, fish will be killed when abruptly transferred to waters with pH values more than 1 unit higher than the water to which they were acclimated.
Sudden transfer to waters 1.5 pH units higher will kill about 50 percent of the fish, and transfer to water 2.2 pH units higher will kill almost all the fish.
This intolerance of catfish to abrupt increases in pH has important practical considerations.
Most newly hatched catfish fry are held for several days in hatchery tanks supplied with flow-through groundwater with a pH near 7.5.
Fry are then transferred to a transport tank (usually filled with water from the same source used in the hatchery) and then stocked into a nursery pond for further growth.
Nursery pond pH cycles daily, and if fish are transferred to the nursery pond during the afternoon when pH is usually highest, many fish may quickly die.
The solution is simple: First measure the pH of the water in both the transport tank and the pond, and then transfer fish only when the pH of the receiving water is very near, or below, that of the transport tank water.
Pond pH is usually lowest a few hours after dawn, so this is usually the best time to transfer fry.
You can order digital ph meter and Temperature meter from us now.
Only limited stock available
Ph meter price: N10,000
Temperature meter price: N5000
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N900 in lagos Island.
Changes to price applies soon as Promo Last. Promo only in Lagos occupant.
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