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Ok cool, thanks. I didn’t know sponge could look like this.Looks like possibly a sponge. Likely harmless, but if it starts rapidly spreading, you may want to manually remove it. Some sponges can run amok if allowed to.
Good to know, thanks! I didn’t know sponge could look like that.I have that sponge growing on my frag rack, sump and overflow. Harmless
Is it hard or soft…Good to know, thanks! I didn’t know sponge could look like that.