Using Thrive All Purpose in a Hoselink Fertiliser Spray Mixer.

Good afternoon. I regularly use Yates Thrive All Purpose Soluble Fertiliser. Great product. I’d like to start using it with the Hoselink Fertilser Spray Mixer that can be attached to a garden hose. What concentration do I need to make up to ensure I’m delivering fertiliser to my plants at the recommenced rate as per the box instructions? I generally use two level spoons (The one included with the fertiliser) to a 9L watering can.