I use Hanna testers for alkalinity and phosphates. But my LFS runs a spin test for all the parameters on the previous photoNo that unit is not suitable for dinos. Green Killing machines have a poor record in treating dinos, likely due to their built in pump with too high a flow rate. One thing that everyone has to realize is that manufacturer's recommendations for size and flow are MEANINGLESS for dinos. They have not designed or even thought of using them for this application.....so you can't go by what size the package says it's good for.
You can give it a go but I'm afraid it will be a waste of money and time.
What kits were used for your parameter testing? Magnesium is really low. Is nitrate 1 or 0.1?.....both are too low with dinos (5-10 is the best goal for NO3). PO4 is fine if you get your NO3 up to around 10. Brightwell makes a good supplement to raise NO3.
I will look into Brightwell to increase the NO3 levels