Does obsidian have any affect in an aquarium?

  1. cwb141 Member Member

    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. Aquarist Fishlore Legend Member

    Hello CWB. Glass will not alter your pH.
    Ken
     

  3. Weedcali Initiate Member

    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.