below 50 or above 300 is not safe. Ingrid

Hal wrote:
I did run across an article about using copper for algae control and
it states copper should not be used if the KH is below 50ppm as fish
kill can result. I use limestone to keep the KH up and it often
reads 1 degree although the pH stays at or above 7.8 most of the time.
Sound reasonable that I could throw in some baking soda while I'm
treating with copper??

Regards,

Hal


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