![Is this mold on my carpet? Never seen this before. Next to AC unit door. Is it dangerous? : r/Whatisthis Is this mold on my carpet? Never seen this before. Next to AC unit door. Is it dangerous? : r/Whatisthis](https://preview.redd.it/4z44z93afxj91.jpg?width=640&crop=smart&auto=webp&s=1bb55c9fd8293ba242d6de43454b1209c4eb0088)
Is this mold on my carpet? Never seen this before. Next to AC unit door. Is it dangerous? : r/Whatisthis
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