Okay, the problem is that my angel's fins are drooping and sort of rolled on to themselves. I've searched for 'drooping fins' and came up with basically that they're sick or I have water problems, but such general information doesn't do me much good. So here is a little background to my issue.
I have a 55 gallon tank with a XP2 filtering it, I do frequent water changes and have had this particular tank close to a year and suddenly I had a huge ammonia spike with my ppm being 4 - 6. Okay, I immediately started treating the water with Ammo-Lock with little effect. After that I tried using Ammonia Detox which still did not have the effect I had hoped, it left me with my ammonia around 4ppm.
Not wanting to lose one angel in particular I put all my angels in my girlfriends 90 gallon tank with is filtered by an XP3. Her tank does not have an ammonia issue nor any other I can test for with a master test kit. However, my angel after about a week is getting tears in his fins and it's becoming pretty ragged looking. Also, he's developing a white film over his body and the angels (including her small ones now) have drooping fins.
Does anyone have any idea what this could be, and what treatment I can do to fix the issue? This photo is the best I could do with my phone.