- NextSeq 1000/2000: 5% PhiX spike-in
- NextSeq 500/550: 5% PhiX spike-in
- NovaSeq 6000:
- 5% PhiX spike-in when pooling with non-Curio Seeker libraries
- 10% PhiX spike-in when pooling with only Curio Seeker libraries
- 5% PhiX spike-in when pooling with non-Curio Seeker libraries
- 10% PhiX spike-in when pooling with only Curio Seeker libraries