just bought it at the dollar store, i just made sure there we're no inverts or corals near by, my hair algae was literally smothering my condy anemone so it was kinda ackward squirting scalding water at the algae, i think if i remember correctly you're supposed to let it linger very slowly over the algae, it was pretty neat as corraline took over the rock right away as soon as i got rid of the GHA
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