Our tortoise excreted a cloudy white liquid this AM and wondered what this means. Have not seen this in year + we've had him (normal color is dark brown or green).
He eats romaine lettuce daily (with calcium sprinkle couple times a week).
He is now indoors for the winter here in Houston.
Got a new UV light this winter. Last winter used only a red infrared light for warmth.
The white cloudy liquid your tortoise expelled is the same as what a bird expels -- urates -- and it is normal. If it ever gets hard, your tortoise is dehydrated.
I hope you are feeding your tortoise something besides romaine lettuce. Tortoises need roughage in their diets. Hay that is low in protein would be a good place to start. The calcium sprinkle is good idea.