Best 2-Part or 3-part nutes for coco?

Hello, this is my first time using Coco and i have been using holland industry’s 3-part nutes but recently i’ve been seeing crystals froming on cap from the outside. What are the best 2-part or 3- part Nutes for coco?

I use vita link as base nutes

Why do you want a 2 or 3 part?

I use GH MaxiBloom from start to finish and my plants are always perfect to the end........plus it's inexpensive.

2 parts have more micro and machro