Good news: We're coming up on exactly a week, and I think we're stable now. The azolla is clearly growing roots, and the maxigro nutrients I added has clearly helped, along with getting the pH to around 6.

Bad news: The biggest mistake I've made I think is not adding the nutrients earlier, because they've been nutrient starved this entire time. In the future I'm going to have to manually separate the azolla from the duckweed once it has had more time to grow.

I think roughly 30% has died, but this remaining is now growing roots. I don't really care about the duckweed, which is clearly surviving, as a good sign for the azolla, but they are competing for P and K. So I added another two tsp of the maxigro which is balanced NPK. I also run the pump for about 10 minutes a day to help circulate and aerate the solution.

Any tips or suggestions are greatly appreciated, thanks for reading!