Need to stabilize asap. How do?

[Neon_reefboi]

My alk is actually off the charts since the salifert test doesn't even register. Need to even everything out how do I do this cheaply and efficiently. Iv got the api master test kit and the salifert big three. I also have the red sea foundation+ supplements

 

[Neon_reefboi]

Also had a phantom death which spiked my nitrates so any help would be nice