Last time I checked the water, I had low nitrites and nitrates, like less then 20ppm and .25ppm. No ammonia, ph 8.2, specific gravity 1.019 like always. Temperature 74-76 degrees Fahrenheit. What size tank do I need for a freshwater bath? Will a one gallon work? That's what Ive got. I am also repairing a cracked 10 gallon that could be ready in 1.5 days at best, it will probably take me longer to repair. I don't have a heater for the 10, though I do have a 2.5 to 5 gallon rated heater I'm not using. I do not have any copper based medication. In best case scenario I could maybe-MAYBE have some by monday or tuesday. This is my first case of anything I've ever had to treat in marine fish, though I have cured mild freshwater fin rot once successfully before. Ideas are welcome!