Most types of dishwasher detergents are safe for septic tanks.
However some of the best types of dishwasher detergents that are best for septic tanks include.
Grab Green Automatic Dishwashing Detergent Pods.
Better Life Natural Dishwasher Gel.
Lemi Shine Natural Dishwasher Pods.
Puracy Platinum Dishwasher Detergent Pods.
Sun & Earth Concentrated Liquid Dish Soap.
Method Dishwasher Soap.
ECOS Earth Friendly Wave Dishwasher Gel.
Cascade Complete is also safe for septic tanks.
Members Mark and Cascade are 2 of the best dishwasher detergents that work great to clean dishes in a dishwasher.
I've used Cascade mostly but have also gave Members Mark dishwasher detergent and they both work just as great at cleaning dishes and leave no residue.
The best dishwasher detergent and I what I use is the Cascade Complete Powder Dishwasher detergent.
The Cascade Complete Dishwasher detergent gets my dishes clean and leaves no residue on the dishes when used.
I've also used Seventh Generation Ultra Power Plus Dishwasher Packs in my dishwasher and those work great as well.
But my go to dishwasher detergent brand is the Cascade Complete Powder Dishwasher Detergent.
I have also in a pinch used some regular dish washing liquid in my dishwasher and it worked out okay when I was out of dishwasher detergent and could not afford anymore.
But the dishwasher detergent is what should be used in a dishwasher as it creates less suds and leaves less residue on your dishes.