Hi, everyone. I’m not exactly new to fishkeeping; however, I finally have a tank again after 18 years of break from the hobby. I’ve just started out again with a new cycled tank and some angelfish I purchased from Petsmart. After putting them into my aquarium I noticed something strange looking on one of the angel’s fins. It appears to be Ich, but it doesn’t have the classic ‘salt grain’ look to it.It’s also been on the fins, in the same place without change, for 5 days. My gut is telling me to treat the entire tank now to be safe, but these spots almost have an egg-like appearance. One friend believe it’s Ich but isn’t confident. Is this really Ich? Any information is appreciated. Thank you.