1 Congo and 2 rummies have it. White patches almost like wounds from rubbing against something. It’s mostly on the top. All fish are swimming normally. All are eating normally. This is a 75 gallon planted with heavy filtration. I have about 12 corrys, 10 rumnies, 6 Congo tetras, a couple ottos, a betta, ton of shrimp, and 2 dwarf frogs. They had ick a few months ago but I treated it and they’re cleared up. I do a 30% water change every week. Given a varied diet of frozen foods, flakes, dried tuboflex worms, & crushed snails.
Temp - 76-78° they’re under a vent
ph 6.6
gh 8-10
kh - 1-2
ammonia - 0
nitrites - 0
nitrates - 5-10