Yikes! Ammonia that high is toxic to fish! Do you have chloramines in your water supply? If so, some treatments don't bind the ammonia that results from breaking it up--others bind it as ammonium, which some test kits will detect as ammonia, even though it's not toxic. Since you added the treatment, I'm guessing you are seeing both ammonia and ammonium. The test kit should indicate if it's showing one or both.
Good to know your pH is okay, though! Since it's sounding like this may be a bacteria bloom, I'd advise you tough it out. The microfauna needs to gt into balance, and the more you mess around, the harder it is to reach this balance. Do regular maintenance, but nothing extraordinary. sorry--I know this contradicts my previous advice, but then I thought the cloudiness was from solid particles in the water.