I guess its progress What's your temp now? Increasing temp will speed up the ich cycle a bit and it would be nice to get rid of this in the next week's treatment.
Using Heat to Treat Ich in Freshwater Tropical Fish - Article at The Age of Aquariums - Tropical Fish
The Ich life cycle is temperature dependent. Higher temperatures within its livable range speed up every stage of the life cycle, while the lower temperatures will slow it down. At 18°C/64°F the cycle takes 10-12 days to complete.
Using Heat to Treat Ich in Freshwater Tropical Fish - Article at The Age of Aquariums - Tropical Fish
The Ich life cycle is temperature dependent. Higher temperatures within its livable range speed up every stage of the life cycle, while the lower temperatures will slow it down. At 18°C/64°F the cycle takes 10-12 days to complete.