Wasserqualitätsteststreifen Kompatibel Mit Aquarien - 7-in-1 Test Für Härte, Chl
Too high or too low PH is not good for fish growth. If the pH value is less than 4.4, the fish mortality rate can reach 7% to 20%. When the pH value is higher than 10.4, the mortality rate can reach 20% to 85%.