Generally, every 2 or 3 years. Tank size, water consumption, garbage disposal and products used in the home can greatly influence how often it should be done.

Your septic system will always look "full"--this is how it is designed to work. It is at working level when it's just at the pipe. If it's over the pipe, then it's overfull and should be pumped before you have problems.

No, the bacterial function of your septic system is all natural. The only thing that should go down your drains are toilet paper and wastewater. Grease, oil, fats and baby wipes should be thrown in the trash. Household disinfectants, cleaners, bleach and antibacterial products should be used sparingly.