Sera kH test

[Dennerle]

i scoop up 5ml of tank water and add 3-4drops of the solution. Until how many no. of drops in the 5ml tank water makes the solution change from blue to yellow is ideal?

[zmzfam]

are u asking what should be the ideal kH for your tank? The kH is given by the number of drops required to change the colour of the water from blue to yellow/orange.

[vinz]

Dennerle,

Read this.

[Dennerle]

thanks for the useful website

[Dennerle]

third drop the solution changed from blue to yellow. My Dennerle co2 test is green means enough co2. So my pH ard 6.6 and 6.8 means ok for planted tank. Thanks. Understood

[Dennerle]

for kH value, 4-6 is considered alright. 3 quite low. What will happen if there is too low and too high kh? e.g 1-3kh and also 7kh and above?

[vinz]

Low KH shouldn't directly affect your plants or fishes. High KH, I'm not sure.

However, changed in KH will affect pH if the CO2 levels are not changed. So look up the chart and see the new pH levels. There may be problems if the pH value is too high or too low for your fishes/plants.

Zero KH is something to worry about. Without KH, the same CO2 levels can drop the pH very, very low. Some fishes/plants may not be able to take it.