Doesn't look safe to put in my discus tank

Just got these and in the packet the little balls were brown. I rinsed with tap water and then soaked them in bottled drinking water... when I squeezed gently to let air out, tiny white color "spores" came out. And there are more coming out still. I will leave these in a separate container for a few days and see what happens. But I don't think these can go in my tank. They look more like hairy mud balls than the marimo moss I've seen.

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