Ok , it’s consider a soiless medium since it’s compose of mainly canadian sphagnum peat moss but have in it perlite, dolomite lime and calcitic lime , so pH will not be as bad as if it did not have them.
And mix with the sea trio , that have also the same components plus crab, kelp and shrimp meal should made a fearly good soiless medium with a pH required to be between 6.0 and 6.5 since it have pH up and stabilizer like dolomite lime… Pure sphagnum as a natural pH of around 4.5. My only concern is since it’s a soiless medium, usaly, nutrients uptake optimal is between pH 5.8 and 6.1.
I prefer Fafard connaisseur that have humus on it and can be consider as a soil for that reason.
Cannabis plant do not like to acidic medium to grow in it, That’s why reputable compagny like Lambert and Fafard put amendement limestone in their products to help have a more adequate pH in presence of sphagnum.
The two should work well together.