Purple encrusting sponge?
Posting for the ID forum. Looks like a baseball piece of LR became encrusted in what looks like a purple sponge. Very weird because it's old rock and I hadn't added anything it could have hitchhiked in on for many months.
By alizarin
Posting for the ID forum. Looks like a baseball piece of LR became encrusted in what looks like a purple sponge. Very weird because it's old rock and I hadn't added anything it could have hitchhiked in on for many months.
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