ph Guide

ph is the measure of acidity or alkalinity of water. A ph reading of 7.0 is considered neutral, a ph reading higher than 7.0 is alkaline, and a ph reading lower that 7.0 is acid. An acceptable ph range is 6.8 to 8.2. Extreme ph levels above 8.2 or below should be avoided.

Acid 5__6__7__8__9__10 Alkaline

Test ph in the morning. ph rises during the day as the water temperature warms up. To lower ph, using vinegar (acid), add 3/4 cup per 100 gallons of pond water. To raise ph, using baking soda, add 1/4 cup per 100 gallons of pond water.

Adjust ph 1 number (point) per day, no more that 2 numbers (points) per day. Rapid ph change is stressful to fish.

Hair algae/blanket weed thrives in alkaline water. Water in the acceptable ph range is one way to control this problem weed.

Calculating Pond Volume
Irregular shaped garden pond:
L' x W' x AD' x 5.9 = gallons in the pond

Square or rectangular garden ponds without plant shelves:
L' x W' x AD' x 7.5 = gallons in the pond