Okay, I've diluted my fertilizer concentrate by a factor of 1:10. Glad I put my bad math on display to be checked!!!
I was using a siphon sprayer that I found at a thrift store before the Dosmatic, and from the tint of the water coming out alone, I think it was mixing in a lot more than I thought. I'm excited to be able to know how much fertilizer I'm applying once I get the calculations down!