Oral lesions (mouth sores) make it painful to eat and talk. Two of the most common recurrent oral lesions are fever blisters (also known as cold sores) and canker sores. Though similar, fever blisters and canker sores have important differences.
You could do a school of White Cloud minnows, they require cooler water, so you wouldn't need a heater. I think if you check the profiles, the ideal temp should be no lower than 67 degrees. Not positive.or example: my goldfish tank is fine in the summer, but my house gets so cold in the winter that I need to have a heater to keep it above 70F. Fish need a constant temperature which is one of the reasons we use heaters.
If you are looking for the best freshwater aquarium filter, there are many great options. For tanks less than 30 gallons, a power filter works well. Freshwater tanks up to 150 gallons can really thrive with a canister filter. For a large freshwater tank (over 100 gallons) a wet/dry filter is a great choice.Saltwater aquarium filters differ from freshwater aquarium filter systems.or tanks less than 30 gallons, a power filter works well. Freshwater tanks up to 150 gallons can really thrive with a canister filter. For a large freshwater tank (over 100 gallons) a wet/dry filter is a great choice.