staurogyne repens spreading horizontally

[JackBlasto]

So staurogyne repens spreads horizontally as I've read... Mine seems to be getting runners that float to the top... Meaning it grows horizontally but doesn't quite root into the substrate . Am I doing something wrong? Should I just be patient? Should I assist all the runners by planting them indefinitely into the future?

 

[Scottyhorse]

It is possible you don't have enough light, so they are trying to reach the surface for better light.