I purchased some new anubias nana petite from mail order 3 weeks ago, the came with dying leaves. i put them in my tank and all leaves died and were gone in the first day. the rhizomes are still green but no new leaf growth still. Does anyone have an educted opinion if i they will grow new leaves or am i wasting my time and should just yank them out. I have good water quality, good light , no CO2 but using flourish excel. The anubias nana petite i had from before is doing fine. Any help? thank you.