I have two buse "mats" both came from the same person and both are brownie varieties. One of the started off great growing new leaves weekly. The other showed little new growth. Fast forward about a month and the rhizome of the buce that started goodles is now dead, very little green left, and the buce that showed little growth is almost all bright green rhizomes. Any idea on what may be happening. I did lower my lighting as I was getting a lot of hair algae.