Hey, I have 4 cories. I was reading the profiles, and it seems that two are Julii (dots on side), and two are Trilineatus (Lines on sides). They are in a 10 gallon tank. Low hardness, mid-low pH. Recently, they have been acting very lethargic. They still eat, and sit upright, but do not swim a lot.
Some background info: I also had a very terrible ammonia incident last month, and have only recently treated it. Prior to that, the fish were also quite lethargic, but swam around a lot around 8 PM when I turned off the lights. Now, they just seem like they always are sleeping. Any ideas? Add a couple more Julii/False Julii? Are these fish naturally quiet?
Also, I'm considering adding some focal point fish. Maybe a gourami or a betta.