Septic Safe Homemade Laundry Detergent?

Hi
We are new to septic tanks and I want share what we recently learned. We had the home 3 years. The septic was inspected before we completed purchase and drained. It was due for 3 year drain 7/15/19 and we scheduled it for 7/1/19. The worker kept asking if we use grease, like Crisco. After telling him no for a 3rd time, I asked him to show me why he kept asking that question. There were multiple white masses being pumped from the plumbing lines. I could actually see the drain jerking from the blocks it was sucking out.

I have made a borax base dry detergent for over 10 years but we never had septic tank until this house and were not aware that soap powder was a nono. There were also wet spots in the yard where the T had disconnected from the tank and liquids were not making it to the drain field. He said we were lucky not to have it backup into the house. We also learned we were washing clothes too often. 1000 gal septic tank can only have 1 load each day or 2 every other. I have switched to liquid detergent but I am searching for homemade septic safe liquid recipe because the detergent we have to buy is way too expensive. My son breaks out if we use detergent that is not free of perfumes and dyes.