My freshwater aquarium pH value jumped in a week

Posted by on October 15, 2010 Leave a comment (0) Go to comments

I am confused. Again. But I guess this is the fun in having a freshwater aquarium 🙂

Last weekend, six days ago, before a water change, I checked my water’s pH value: ~6.6. Today after changing the water, it has jumped to 7.4. This cannot be good. I did a 30% water change. Should a 30% water change (on a 180 liters tank) impact the water pH this much? I am also not sure why the pH would go up – I have understood that overfeeding will lower the pH. So I guess this is good news in a way. But 7.4 is still too much.

Any ideas?

Water,

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