I've got tried ... now I feel with Lilaeopsis brasiliensis!
2 whole jars of Glossostigma elatinoides now have only 2-3 plants ... half covered by algae, above.
All the others were merely returning to the surface because of

• Ancistrus
• Cone snails churning up the soil from under
• the accursed E. Siamensis who lives in my aquarium and I do not know how long it has become a calf!

So I passed the Lilaeopsis brasiliensis, nice layout, the higher the glosso, will be at least 4 times that amount, about 5 cm, but lower dell'Echinodorus tenellus.
The Lilaeopsis most definitely has its roots long and strong, so once it has rooted ... if and when it takes root, will definitely much better than the last. So the work of "recovery" from the surface of the water I'll have to do the same, but the goal is to do it with less frequency so that sooner or later most of the plants have rooted, forming a beautiful lawn.
Also, the final effect, especially in medium to large aquariums like mine, is not bad ... it looks more like a meadow than Glossostigma, after all, look here for example