Anyone use Captain Nemo's crab fertilizer?

[Michigan Tree Murderer]

I've used this in my vegetable garden and was wondering if it's applicable for a Barbados Cherry bonsai? Since Barbados are susceptible to nematodes I was considering using it., as a preventive. I know Fert is Fert but since I'm new to this I thought I'd ask, if anyone uses it and how they apply it.