If that is what he's trying to do he is doing it wrong. 24ppm was not the target for mustard algae for the 30ppm he has been reporting prior to today. You don't do a whole slam at mustard algae levels. You finish a regular slam by meeting all 3 criteria for a completed slam then raise the FC to mustard algae level for 24 hours only.
bjsbuds has been targeting 24ppm for the last several days when he was reporting a CYA level of 30. There are multiple posts on the last 2 pages of this thread that state he is targeting his FC level too high for his CYA level, and he has not acknowledged any of them, nor has he reported lowering his target FC to the appropriate level.