GH Flora Bloom replacement

Hey guys, so I live in the Philippines where it's stupid hard to find nutes and they're also ridiculously expensive. I fucked up and knocked over my bottle of gh bloom and they only sell the trio as a set.

What would be a good replacement? I can get my hands on gh liquid koolbloom wich is 0-10-10.. Since the gh bloom is 0-5-4 could I just use koolbloom at half dose?