they began melting in shipping, and I hoped they would get better in the tank, they continued the melting process.... I let the rhizomes loose, and replaced the plants... the rhizomes were firm and looked normal... they floated around until they found a place... I don't see them anymore, assume they snagged into the pothos, or peace lily roots... maybe someday I'll see a new start somewhere??? That has happened often with java fern, where a baby breaks off, and starts a new clump, somewhere else ( though I've never had java fern melt )