Your preparation plan sounds generally appropriate if your healthcare provider specifically instructed you to start the Coloprep solution at 6 am and consume 1000 cc within an hour before your 10 am colonoscopy.

• Follow your doctor's instructions: The timing and amount of bowel preparation can vary depending on the specific protocol your doctor prefers and the type of preparation used.

• Split-dose preparations: Many modern bowel prep regimens use a split-dose approach, where part of the solution is taken the evening before and the rest on the morning of the procedure. However, some protocols allow starting only on the morning of the procedure, especially if the procedure is scheduled late morning.

• Confirm with your healthcare provider: If you have any doubts or if the instructions you received differ from what you expected, it is best to confirm with your doctor or the clinic performing the colonoscopy to avoid any issues with bowel cleanliness.

• Hydration and diet: Also, ensure you follow any dietary restrictions advised (usually clear liquids) and stay well hydrated.

If your doctor told you to start at 6 am, it is likely safe and effective to do so. Starting the night before is not always necessary and depends on the specific preparation protocol. Always prioritize the instructions given by your healthcare team.