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Hi there,

yesterday I had my hardness tested due to an unusual ph reading and it turns out it was 900 whatever, so I did water change and will do more over the next few days. I removed the rocks and will test them with vinegar today 2 thinks what happens if they are unsuitable? and is it fool proof I mean if they don't fizz could they still be a problem?

The only other things in the tank other than flora and fauna is substrate (Dupla ground) which I believe is inert and the mopani driftwood that was soaked and boiled in our town water which is very hard. Could the driftwood be leaching that hard water?

Regards Darren
 

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Re: Testing rocks with vintager

You really need to use a stronger acid than the acetic acid found in Vinegar to be sure.

Muriatic acid is a weak concentration of hydrochloric acid. It works much better. You can find it in masonry shops, pool supply shops, Lowe's, Home Depot, etc. It's quite inexpensive for a large bottle. http://en.wikipedia.org/wiki/Muriatic_acid
 
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