Help saving my keikis (phal)

[Helzy]

Hi.

My Phal has been in recovery since it suffered from root rot and has now been producing two keikis in one branch. Keikis have not yet roots altough I saw one small green nub in the bigger keiki (assuming it to be a rootlet). Now my problem is that the branch where the keikis are has started to yellow from the top. Yellow is now a few millimeters from the upper keiki. Both keikis are only about an inch tall and have two little leaves in them. The mother plant has now also started to grow a teeny tiny root (finally). Is there anything I can do besides wait and see? The plant is in a small aquarium and has really enjoyed it there (on moss and having extra light).
Thanks in advance.