Kh Issues!

[Rorie]

I have added my fish to my planted aquarium and they are doing fine. My CO2 is also being distributed quite well.

I just tested and got the following

PH 6.4
Ammonia 0
Nitrite 0
Nitrate 5
GH 3 (drops)
KH....Issues!

I am supposed to see the KH change from blue to yellow. But even after one drop it is already yellow! So i have a value less than one i guess! Is this bad? What can i do to fix it?

 

[electropunk06]

Hi, what fish are you keeping?
Dose your PH swing much or is it steady?
Lloyd