Micro Sword Problems

[Crossfire]

I have some Lilaeopsis brasiliensis in my tank, position under direct light and by the filter output so it gets some flow. I put root tabs in the area before adding the plants so they would have some nutrients to use, and I also use liquid fertilizer and daily liquid carbon. However, the plants are refusing to carpet, and worse yet, some leaves are beginning to turn yellow. As if that wasn't bad enough, the darn things keep floating out of the sand (not as much as before, they must be taking root) Any advice as to prevent them from dying?

Oh, and I have T5 lighting.

Thanks

 

[TrainRek77]

Sometimes when they are relatively new to the tank they melt. The leaves turn brown then clear and melt off. Also, sometimes they stay stunted for a while because of the new environment. I've had this problem with quite a few plants. I have a hygrophila that didn't grown for 3 months. Then it started to really take.

 

[Ps3Steveo]

I found that with Lilaeopsis and liquid carbon it doesn't grow very lush, mine had very thin leaves and didn't carpet at all, how long has it been in your tank? Also with sand I found that the roots have nothing to get a good hold on, do you have anything under the sand? If not how deep is it?