Garden of green guava grow

I swear this plant is going to survive on plain water .got a bit of burn at 80ppm but seems to be the right size now to be able to handle minimal amounts of nutrients. new growth is looking decent enough , roots were starting to turn for the worse so cleaned them and got some fresh solution in there .also ditched the excelurator silver as it seems to be working better on more established root systems in the garden seems to be a slow grower but now there's roots in the water I'm hoping for a take off soon .