The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
Cut the tops and replant
Leave the healthy bottoms in place
Toss the ratty bottoms in the garbage (not outside / down the drain, many hygro's are bad invasive species)
Cut the tops and replant
Leave the healthy bottoms in place
Toss the ratty bottoms in the garbage (not outside / down the drain, many hygro's are bad invasive species)