it probably didn't do well due to your fertilisr. Most fertilizers on the market rely on your tap water having some of the nutrients plants need to grow. If your water doesn't have a nutrient your fertilizer is deficient in plants will quickly die. Ro my RO water tank I spent years trying to figure out my plant growth problems and after trying 4 different fertilizers I tried making my own fertilizer with all 14 plant nutrients. Now I have been able to grow most stuff I put in my tank and that includes dwarf hair grass. Unfortunately it is not making your own fertilizer is not the easy solution to fertilization. And at this time I have not found a easy combination of commercial fertilizers that I could easly solve the most common problems. Most fertilizer s are deficient in at least one of the following nutrients Calcium, Zinc, Copper, Molybdenum. OF the commercial fertilizers I used that failed were Seachem flourish, Seachem trace, Aqueon, and the Common EI fertilizer mixes.Yes I am talking about the same plant in those pictures. I've never had success with it and it used to rot within a week of being in the shop tanks and we had lots of light and fertiliser in the plant tanks.
My tank is not a high light tank. It is a medium light tank and I do have CO2 but I am operating at very low CO2 level A CO2 Drop checker will not detect my CO2 levels. Other people Use a PH probe to check there CO2 levels and even that says I am low. And yet my plants are happily producing oxygen bubbles right now.