I have a red eared slider about 5.5 inches and I recently found that he had swollen and puffy eyes.
He was fine a few hours ago before I did a 50% water change and gave him a new calcium block.
some time later, he was chilling on his basking platform under the heat and UV lamp when i realized that his eyes were swollen.
I think it's because i didn't dechlorinate his water but he never had a problem with it until today.
any thoughts?