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[APD] Plant Growth and Alakalinity

This is to follow up on Bill W's question of a few days ago, about growing
plants in very alkaline water.

Ms. Walstad has stated that a pH of 8.0 is a practical maximum for growing
most plants; Dr. Kasselmann says that there is a maximum but doesn't state
what it is, except that is less than 11.  But I haven't been able to find
anything posted here about a maximum,  and I would think that if there were
one, it would have been discussed.

So my hypothetical question is, given two low light tanks with adequate
nutrients and carbon provided by Excel, will the tank with pH of 7.0 grow
most plants better than the one with a pH of 8.2?



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