ive used something similar, that clouds up after 24 hours in a fish tank and stays like that for 48 hours in a tank with various scratches and bite marks from toothy critters but after a few hours of sitting out of water, the hardness and clarity returns. great thing was that, clear was back to being just as hard with no ill effects with bite marks going all the way through the paint. still use it today and will continue to use it.