Without adding CO2, how to have med-low kH and neutral pH
I am trying to set up a small shrimp tank with only 2 plants and 3 shrimps. For my cherry and Amano shrimp, the suggested water parameters are dkH 3-6 and pH 7+/-. Initially, I hope to not need to inject CO2. But when I look at the kH/pH/CO2 chart, I assume I am supposed to use the equilibrium dissolved CO2 value of 3ppm . This results in a pH in the mid-upper 7's.
Is there a way to have a slightly buffered system, with pH right around 7, but still maintain some kH? On the other hand, I am not sure how important kH is. There is this popular shrimp substrate called Stratum that buffers to slightly below 7, but I think takes out the kH in the process.