Shouldn't be a problem- Only thing I see is possible precipitation when you add the PK. Presents as a white cloud when you add the clear PK to the mix. I don't know the Pura Vida stuff @ all, so I don't know how cloudy it is- just keep an eye out. Boost'll be fine. Do the Boost before the PK- that dark blue-green makes it really easy to see if the PK wants to bloom.

Only run the PK for a week, at least the first time.

You know that the PK and the boost aren't organic, right? Canna's got an organic version of the boost on the market, if yer religious about it.

Always a good idea, when yer mixing products amongst manufacturers ( or even adding products from w/in the same line) to mix up a sample and let it sit for a few hours, to see if anything untoward happens- pH movement, crystallization, precipitation out of solution, that sort of thing.