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.
Air-driven Internal Filters These small, inexpensive box-like or foam filters are ideal for rearing fry, hospital aquariums, and small aquariums with very small fish. They are strong enough to maintain good water conditions, yet gentle enough to keep small aquarium inhabitants free from harm.hey are made for smaller aquariums, generally under 20-gallons. Power Filters. Power filters are probably the most widely used aquarium filters-and for good reason. They are very easy to use and provide excellent biological, chemical, and mechanical filtration.