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Hey all just got a question, checked my tank today and ph was between 8.0 and 8.2 but my hardness is low any ideas? I have 2 very large bits of Texas rock in the tank, 4x2 not sure how much coral I have in filters though.

My results came back at only 4 drops.

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I would suspect the test kit .

But if the water is that soft and is alkaline it would be quite unstable with the PH crashing into the sixes quite quickly at the first sign of any decomposition .

So if the PH is stable I would suspect the kit .

If you have coral in the filters it should start making the water harder in 24 hours ( ph faster ) unless it is coated with algae or some other bio-film very thickly .

It is much easier to have hard acid water than soft alkaline . Unless , that is , you have a dissolved alkalid like caustic soda , which , if you have living fish in the water is unlikely .

Are you using rainwater or tap water ?

Edited by pony-tail
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