Ta-dah
As expected, your nitrates are steadily climbing as the nitrite is consumed. You ammonia looks pretty much at 0. Once the ammonia & nitrite are at 0 and your nitrate has peaked you have a cycled filter.
Remember, when you add the FRT and then in December you add the ray you will have a mini cycle again as the bioload increases beyond your filters conversion capability. It will take a week or 2 where you will see ammonia & nitrite present again.
Use the Seachem Prime in the detox dosing and salt to keep your fish & turtle happy & healthy until the ammonia & nitrite are at 0 again, then do large enough water changes to keep your nitrates in the 5-60 range between water changes