Whitening nail tips

[Sparklyring]

For the first time in years I finally have long nails that don't snap whenever I look at them. They're not particularly strong so don't look white. Any suggestions what I can do to make them look whiter and therefore healthier?

Annoyingly mine only go white when they're dry, but then they also go brittle.
I seem to be able to have either strong nails or white ends, not at the same time.