Ideal for many fish is nearer to 8. pH 7.5 is OK.
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Jim and Sara Humphries, Victoria, BC
"KRF" wrote in message
...

Just set my pond up Wednesday. Tested my Ph yesterday, and it 7.5.
How do I lower it to 7 or below. The book I have from the Library, say
a little under 7 is ideal for plants and fish, is this true? Thanks