Hello! I've been trying to make sure I don't over water my gorgeous new phal and have been using some of the great tips I've found here. The most common advice is to weigh the pot when it's just been watered and compare that to the weight of the pot when it is time to water again, but I'm still not sure when to water again. The phal is in a clear pot, so I can see the roots - should I water when the roots turn a light green or when they are green with a silver hue or should I really wait until they are fully silver (like, aerial root silver)?

For what it's worth, it has a ton of incredibly healthy roots even though it is packed pretty tightly in spag (which I'll be changing to a bark mix as soon as it's done blooming), so I have been waiting 10 days or so between waterings, but I'm still not sure that's long enough...

Thanks!