Yes. I can. In my opinion, I don't think it is all that readily necessary in soil. Root problems are not very common in soil, and usually the only problem is that it gets root bound. I've seen a lot of soil plants in slightly warm places where hydro would guarantee get root rot, but they seem to be fine. I don't think it could hurt, but if your having problems it could help. If they are fine, I don't think it would really HELP you, but I think it's a great reviving tool in soil. You can't burn your plants easily with this stuff either, so thats really nice.
For hydro its a must. But for soil, eh, if you want extra protection, sure, but I personally don't think it will increase yield by THAT much. Hygrozyme isn't cheap either.