Nope. I use it straight out of the bag - I don't even wet it, before I plant. I just put some rooted clones in solo cups. I cut a couple slits off the bottom edge, filled about half way with tupur, placed clone in the center then filled the rest & packed just enough to hold up straight, water till some runs out of the slits - done!
I'm no pro!
Tupur has been a big upgrade for me! Never done hydro but I think it's easier than my soil grows. I've not overwatered once, in fact, I'm watering three times per light cycle! I've been playing with some cal-mag and have seen better results, but have been following canna.com's light feeding schedule with a couple nice harvests!