pH 7.4 and alkalinity 200 for BG and LMB as per SRAC. Most pond fish are about the same.

I don't check pH as it fluctuates to much. I check alkalinity it does not change much or fast. Good alkalinity reduces pH swings.

See this SRAC 464 Interactions of pH, Carbon Dioxide, Alkalinity
and Hardness in Fish Ponds - http://srac.tamu.edu/index.cfm?catid=25


Last edited by ewest; 08/21/08 10:00 PM.