Hello, I have a 55 gallon community tank, and I am afraid my Electric Blue Acara may have Ich. I read through "What to do if your fish gets sick" sticky thread, and am about to go do a big water change, but I tested the water a moment ago, Ph is 7.5, Ammonia is 0ppm, Nitrite 0ppm, Nitrate 5ppm (I used an API Freshwater Master Test Kit, if that matters). The tank is running with 2 heaters set to keep the tank at a regular 79 degrees, it has a Marineland Penguin Biowheel 350 as well as a 200. The filter media is just the little filter pads the filters came with (I believe they have activated carbon in them). The tank has a sand substrate, 3 fake plants, 2 small rocks, and 2 Anubias that I am letting float. The tank is home to 1 Electric Blue Acara, 12 Bloodfin Tetra, 1 BN Pleco, 4 Neon Tetra, 1 Olive Nerite Snail, 6 Pygmy Cory, and 3 Pygmy Cory Hastatus. I use Seachem Prime at every water change. My Acara has small, white dots on her forehead and fins, they look like small grains of salt or sand. She rubs herself on the substrate every once in a while, then hides behind the plants, and just sits there for a bit, then swims around and is active. She is still eating. The only other fish who appear to have white spots also are all 4 neons, and maybeeeeee my pleco, though i can't tell. I only noticed it just today, my aquarium light's shipping was delayed and arrived today, and i noticed the white spots on the fish as soon as I plugged it in. The Bloodfins, acara, and pleco were introduced to the tank last week and were quarantined for a week before that. I will quarantine all fish longer from now on? My question is, what should I do to treat it? I will post photos if i can figure out how. My plan was to raise the temp to 86, and tomorrow my mom will drive me to our LFS to pick up some aquarium salt. Sorry for the long post, I wasn't sure what details were needed for me to get help I needed. Any thoughts?