Ada buffer Ph predicament please help!!!

[Lilshrimp]

I am planing to acquire some crs and crb. I am wanting to raaise the ph of the tank to about 6.4 - 6.7 to get optimal conditions for the crystal shrimp. The tank is currently at a 6 possibly lower ph I can only see so much with an API test kit  I have ada Amazonia soil which buffers the ph Down, how would I maintain a stable ph of 6.4 - 6.7 along with keeping a low ph. Also I have fire red cherrys stocked so any changes would have to be as steady and subtle as possible. I was also thinking of weaking the buffer but idk how to go about that with shrimp inside idk what to do at this point.

[TropicalAquarist]

They are completely fine with low ph, don't worry about it. Adding anything will cause fluctuations which is much more dangerous

[Vpier]

With the ADA soil you are going to be fighting a losing battle until the soil starts to lose its buffering capabilities. The ADA is doing what it is supposed to be doing. All my tanks run between 5.8-6.0 and my shrimps breed like rabbits.

[Lilshrimp]

 

10 minutes ago, Vpier said:

With the ADA soil you are going to be fighting a losing battle until the soil starts to lose its buffering capabilities. The ADA is doing what it is supposed to be doing. All my tanks run between 5.8-6.0 and my shrimps breed like rabbits.

Thanks for the help. 

Have you had any success selective breeding in breeder box?

[Vpier]

I have never tried using breeder boxes.