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Our water has alot of calcium in it. The calcium plugs up everything. Especially coffee makers. I am constantly running vinegar through them so I can hopefully get them to last a year. Now the real problem that I see for my fish is that the pH of the water tests between 8.0 to 8.2 which is on the high side for guppies. Is there a natural way I can help to bring the pH down to a more tolerable level for them? Or will they acclimate to the higher pH?