Jan’s blog about aquarium fish and plants

Another test of pH and water chemistry

Here are values from my smaller aquarium:
pH: 7.1
dKH: 2
dGH: 5
NO₂: 0-0.3 mg/l

And here are values from the bigger aquarium:
pH: 6.8-7.1
dKH: 2
dGH: 14
NO₂: 3.3 mg/l

It seems to me that the more water changes I do in the bigger aquarium, the higher NO₂ concentration is . It is probably caused by Ramshorns who are laying eggs anywhere where it’s possible.