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Try pouring some straight muriatic acid over them.

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17y ago

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Does vinegar removes brown spots?

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To effectively get rid of brown spots on your cactus, you can try cutting off the affected areas with a clean, sharp knife. Ensure the cactus is not overwatered and receives adequate sunlight. Additionally, you can apply a fungicide or insecticide if pests are causing the brown spots.


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You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it is it physical or chemical?

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