Cutting my Keiki loose

[mjgord51]

My keiki's mommy is a Phal and I started to see the stem it was growing from looked like it was dying, sure enough two days later I knew I had to cut it loose.

Now to my question since its roots were 6" and 8" long I heard you can put it in water to soften the roots and curl them around each other to fit better in a starter pot.

How long can it sit in water before I need to pot it and does it sitting in water for long periods of time do harm ?
Thanks, MJ