An estimated 150,000 people in the United States are diagnosed with Spinocerebellar Ataxia. SCA's are the largest group of this hereditary, progressive, degenerative and often fatal neurodegenerative disorder. There is no known effective treatment or cure.Spinocerebellar Ataxia can affect anyone of any age.pinocerebellar ataxia (SCA) is one of a group of genetic disorders characterized by slowly progressive incoordination of gait and is often associated with poor coordination of hands, speech, and eye movements.
A: As a general guideline, a monthly 25% water change is recommended. However, smaller, more frequent water changes (15-20% every 1-2 weeks) are preferable for heavily stocked aquariums or aquariums with large fish. Routine water changes have always been a basic aspect of aquarium maintenance.
Once you determine a schedule that works for you, testing can be done less frequently to confirm your routine is adequate. As a general guideline, you could start with a 20-30% water change once a week. Some people prefer to do a larger change less frequently, such as 40-50% every two weeks. I believe the latter is less desirable since the water chemistry changes more dramatically at once, putting more stress on the fish.