Potential ich and CO2
Hello, I recently introduced a dozen marble hatchetfish into my main tank after 6 weeks in quarantine. I turned the co2 off the day before introduction. There were 6 hatchets in the tank before I put the new ones in and they established a pecking order resulting in some nipped fins. The tank is a farly heavily planted 340 gallon so I'm not concerned about a little chasing. After I tured the lights back on I noticed 2 of the hatchets had a white spot on there tailfins in addition to some pecking damage. I feared ich so I increased the temp to 83*. It's been over three days and there are still just the one spot on 2 different fish. Wouldn't it gave spread if it were ich? I haven't turned the co2 back on, would it hurt if I do so? Thanks.