Thanks for referring me to the links. I'm noticing the usual suspects, but the list can be extended.
Besides the more obligate aquatic species, the list includes popular Hygrophila, Rotala, Ludwigia, Eleocharis, Hydrocotyle, Lilaeopsis, Micranthemum (MC), Echinodorus, Myriophyllum, Limnophila, and my favorite bulk plant, H. zosterifolia. Some species belonging to these genera I have less success with: Hygrophila pinnatifida and Rotala Wallichii come to mind.
However, the list of species and genera can be further extended when CO2 gas is added, but light intensity and water temperature are kept equal. Likely due to its effect on the LCP.
I'm currently conducting an experiment with the same conditions (18C, 5 lumen/liter), but this time with CO2 gas injection. Plant species are Pogostemon deccanensis, HC cuba, R. walichii, Rotala h'ra (already proven, but love the plant), Limnophila aromatica 'mini', Myriophyllum 'guyana', Ludwigia palustris, Nesaea pedicellata, Rotala macrandra 'mini type 2', and intending to add Tonina fluviatilis soon.
Nesaea pedicellata and Rotala macrandra 'mini type 2' are big question marks. HC cuba looks fine, but with upwards growth tendency. L aromatica was only introduced last week and shows some melting. But the other plants are growing surprisingly well. Hence I'm following 'a certain mineral management regime' once again.