corkscrew vallis

Hi all, I’ve planted some Vallisneria Asiaticia “Corkscrew” in my aquarium and it’s suddenly all melted. I know, like Crypts, Vals are prone to melting in a new aquarium, but it was doing ok for about 3 weeks and then every single leaf melted (the attached photo was taken on 28th August)...

So i bought some corkscrew vallisneria and put it in my 10 gal tank and i was just wondering if people think it will do okay in my tank.   My lighting runs at about 2 watts per gallon and i dose SERA flore daydrops everyday and i just have plain aquarium gravel with no CO2 besides what comes...