Some of my plants aren't doing so well. I'm increasing the liquid fertilizer dosing for the column feeders. I also have an Amazon sword with melting leaves. I put two root tabs under it. But I'm wondering if I don't have a deep enough substrate (mine is about 2 inches) for the extensive root network they are known for. I'm considering replacing it with a crypt or red tiger lotus or something. Problem is, it I do replace it then I have to remove it first. It would be very difficult to remove all the roots without disrupting the entire tank. My question is, do I need to? Do I need to get all of the roots out of the substrate or can I just leave some in there to decompose and become nutrients for the other root plants?