I can't remember. Is a higher pH acidic or basic? I know 7.0 is neutral.
Also, how would one lower pH in a 10g tank from 8.0 to 7.0? I'm thinking of doing this.
Next, do sea shells (from craft store) lower or raise pH? Or perhaps have no effect? I have 1 shell in my 10g tank.
Lowering pH
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