I finally corrected my substrate, planted the plants, put the sand substrate in place in my new 29 gallon tank... it took me hours. My back is a wreck.
I transferred some gravel/plants/decor from my established tanks. I added Betta-specific water treatment; a bit of dried fish food, Stress-Zyme, Biozyme, and 3 tablets of Ph 7 tablets. BUT....thinking I was doing the right thing, I also added 3 teaspoons of aquarium salt.
Then I re-read some of my NPT material- apparently salt will kill my plants?! Do I have to start all over again???