What’s the best way to neutralize ph in a 55-gallon aquarium? It’s basically housing a few Gouramis some blood parrots a clown loach and some catfish. it has been set up for about 2 years. The water coming out of the tap is hard...somewhere north of 7.8. The Ph in the tank right now must be 5 or below! This is a friend’s tank I’m trying to help her with. I imagine some gradual water changes will bring the ph up but once things start to regulate in the ecosystem I would imagine the ph will go too high! Just a little confused about this. I have to do water changes anyway because the nitrate readings indicate it's been neglected for a long time. Thanks for any advice!

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