how can you perk up dying plants?

[fairgroundfish]

Since repotting my plants into seperate pots as it had spilt into 3, 1 of them has started to wilt slitley. I remember years ago hearing someone say about taking them out of the tank and placing them outside in a bucket of water so it can get natrual sun light. Can anyone confirm if this is a good idea and how long to leave it out?? i forget what the plant was identifide as on here.... (excuse any spelling mistakes, am on my phone and can only see half screen when writing)

[JamesFish]

Not likely to help keep moving it around as it will pickup root damage. Try extending the lighting time a little and a low dose of plant ferts if safe to use in your tank.