Help Needed for Spec V Tank
I have a Fluval Spec V I am trying to populate with plants but I am having some trouble. This is my first time with live plants so please forgive my learning curve here. Right now I have Anubias Nana Petite and Staurogyne Repens. I probably had 7 plants total and there wasn't much coverage, I just wanted to get them started and give them room to grow. They did for a while but everything sort of crashed a couple weeks ago. The S. Repens has died back a lot and only 2 of the plants I originally added are still alive. The Anubias is living but isn't producing any meaningful growth, even after more than 2 months.
I am using Fluorite substrate for planted tanks. I use RO water conditioned with RO Right*.
Lighting: Stingray LED (2.5 watt/gal)
*I started using RO water after I lost fish (different setup) to what I believed to be possible water quality issues. I know that RO Right is considered to be non-ideal for plants by some and may switch to another product. I recently started supplementing with Flourish (Trace), Phosphorous, and Potassium - maybe that is what kept the plants alive?
Thanks for the help