What is the condition, age, resident count, and expected usage?
What is your fear of your septic?
Bacteria might be murdered by all the soap/bleach/detergent.. from your washing machine, dishwasher, shower, medications....
Or, septic can be overloaded by excessive number of people or septic abuse(washing machine/dishwasher).
Pumping every 2-3 years is a must. Every year is akin to the 3k/3mo OCI. Neither does harm and might be a little financially wasteful. It depends on your usage.
The last 2 septic systems that I've seen fail were ~25 years old and each cost $12000 to fix(location dependent). But, I seen some fail in 5 years and others fine after 35+ years.
So, you have to take at look at the number of people there, the age of the septic, the history of the septic, and the habit of the people, ...to pick an affordable pumping interval.
Wal/K-marts, super markets, LowesDepot, ACEValue... hardware stores have different brands(roebic, ridx, zep, heartlandlabs). And, I bet some roll down the same assembly line. If for some reason you think you must dose, alternate between the brands. And, MEASURE. There is no need to overdose.
Its not always easy to completely adapt ones lifestyle to septic systems. You don't have to. Just remember that your sink and tub are not the garbage. Don't empty out the wet-vac in the tube. Don't use the food disposal.
If you must use a dishwasher(I do cause I'm lazy), then make sure that it is completely full. Learn to load it properly. I have no problem with any of the eco-greenie-enviro dishwasher liquids or tablets. Have a little common sense and don't load complete meals into the machine and everything will come out clean.
If you must take long hot showers because it better than excessive drinking, then invest in an "RV" or boat/marine type shower nozzle. Most water conserving ones are 2.5gpm, and the RV ones are .5-1.5gpm. I like the 2.5gpm nozzle with adjustment. This way, I don't have to wait for hot water and can back off the flow for my needs.
Buy a waterless urinal(thats extreme). Most water efficient toilets are under 2gpf. The older ones are 5-10gpf. Stick with name brand ones. Some newer ones have separate flush handles for #1 or #2 which cuts the water usage even more.
And, every flush at work, at the restaurant, when out... is 1 less flush at home. If the tree is good enough for the dog, its good enough for you.
Use a laundromat. Water efficient washing machine is a must if no laundromats are around. Like the dishwasher, load it up real good. And, as long as you pre-treat, most of the eco-enviro-greenie detergents work well. You don't need bleach or softener. Oxy type boosters can be used if your work clothes are overly dirty. If you want softener, try a baking soda. Or, just stick with softener dryer sheets. My neighbor's washing machine pumps into a barrel and he waters his lawn/gardens with it. Research grey-water recycling as some local codes are ignorant to it.
Eat a yogurt a day, or other fermented 'lively' food. Cheese, sauerkraut... And, eat less.
Buy a small 10-gallon fish tank and keep some fish/pets for the kids. Use the gravity-siphon-vacuum and remove a gallon of water a week cleaning the gravel. Rinse the sponge-type filter into that water. And, poor it down the drain.