Well,,,
NO3 didn't drop so water change, water change, water change
Everything is reset and trying again. The calculator was again used with tested parameters entered for beginning and ending values (same numbers)
75L is starting out with NO3 reading 20ppm, PO4 .5ppm, 7dGH, 9dKH, Ca2 40ppm, Mg2 6ppm
75R is starting out with NO3 reading 10ppm, PO4 .5ppm, 8dGH, 9dKH, Ca2 40ppm, Mg2 1.7ppm