Nynbaul Posted July 10, 2021 Share Posted July 10, 2021 My tap water has a really high ph around 9.. I keep my tank around 7. How should I do water changes to keep the pH from changing to much in the tank? Link to comment Share on other sites More sharing options...
ARMYVET Posted July 10, 2021 Share Posted July 10, 2021 You would need to get R/O water and add some of your tap water to it to remineralize it and make it usable for you without altering your aquarium ph. 1 Link to comment Share on other sites More sharing options...
DarthRevan Posted July 10, 2021 Share Posted July 10, 2021 I also have extremely high PH and GH in Arizona, I was just talking to a local fish store owner and he said pretty much the same thing as ArmyVet, use RO or distilled water and mix tap water into it. He also said to use double the dechlorinator but that might just be for our water in the Phoenix area lol. As for proportions and ratios he said to just keep testing different mixes till you have it where you want it. Link to comment Share on other sites More sharing options...
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