Dwight, remind me, how large is your pond? "Perfect" pH is from 6.2 to 7.8. But, fish can live farther than "perfect" guidelines. There are several ways to manage pH. If pH drops, aglime buffers the acids to bring the pH up. Rarely do I see pH rise too high (10.0 is getting too high). In that case, depending on what mineral or biological process is causing the upward spike, there are several ways to adjust it. The simple way is to use mild acid (expensive). If pH rises because of metabolism of aquatic plants, reduce the biomass of aquatic plants.
Teach a man to grow fish... He can teach to catch fish...
