Sera Ph Test Kit

Makes it easy to monitor the pH value in fresh and marine water and ponds. For approx. 100 measurements.

This single kit tests the pH range from 4.5 - 9 meaning you dont need to purchase a high and low range pH test kit!

There is no "normal" pH that applies to all fish. Because fish originate in ponds, rivers, streams, lakes, and oceans that have different pH levels, the optimum pH levels for fish varies by species. Saltwater fish prefer a basic pH of 8.0 or above. African cichlids often come from lakes that have a pH value above 8.0. Tropical fish from the Rio Negro in Brazil may live in acidic water with a pH of 5.5 or lower!

Keep in mind that pH is not static, it changes over time; in fact, it may even change over the course of a single day. In nature, due to plant respiration and photosynthesis, pH typically drops at night and rises during the daytime. The pH may change as new fish are added or removed, as water is added or changed, and as the biological processes change in the aquarium.

Significant pH changes are particularly hard on young and sick fish. In a number of species of fish, breeding occurs only within a specific pH range.​

If you are planning a new aquarium it's wise to know the pH of your water source, so you know beforehand if it is compatible with the species of fish you want to keep. Some fish such as Discus, and certain other cichlids, thrive in very narrow ranges of pH, which should be taken into consideration when setting up their aquarium.

The pH should be tested at least once a month, preferably every two weeks, to allow for the detection of trends before they become a problem

Preferred pH of Common Freshwater Fish
Angelfish 6.5 - 7.0
Clown Loach 6.0 - 6.5
Goldfish 7.0 - 7.5
Harlequin Rasbora 6.0 - 6.5
Hachetfish 6.0 - 7.0
Neon Tetra 5.8 - 6.2
Plecostomus 5.0 - 7.0
Silver Dollar 6.0 - 7.0
Tiger Barb 6.0 - 6.5
Zebra Danio 6.5 - 7.0