Does obsidian have any affect in an aquarium?

Discussion in 'Freshwater Substrates - Gravel, Sand' started by cwb141, Dec 26, 2009.

  1. cwb141Valued MemberMember

    I have an obsidian sculpture that I want to use when I remodel my 29 gallon tank. Can it affect pH, gH, or kH? I'm assuming that since it's glass it won't, but it never hurts to ask.
     
  2. AquaristFishlore LegendMember

    Hello CWB. Glass will not alter your pH.
    Ken
     
  3. WeedcaliNew MemberMember

    if you really want to be sure. i guess you could setup a container of established/stable water and record your data before and after testing the water.

    Just my 2 cents.
     
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