Something wrong with Xenia and Kenya tree?

Yes get a test kit for it.

 

k what about keeping controlling the alkilinity levels?

 

You can use baking soda or a commercial alkalinity additive.

 

so isnt that similar to aragamilk for buffering ph? i could be mistaken

 

Sort of but not necessarily. Other minerals may be used to buffer the pH.

 

oh ok thanks, any idea how much baking soda for 20 gal?

 

Use 1/2 teaspoon to raise your alk 1 dKH.

 

Chemistry and the Aquarium

This may help, it goes deeper into explanation than I can. It basically explains how calcium and Alkalinity are linked. One level imbalance will offset the other.