all nymphae species produce floating leaves. Some will produce a few leaves that stay under water but eventually they will try to get them onto the surface. If you cut the floating ones off they only produce new ones.
Not entirely true. Yes they produce new surface leaves, but they also continue to grow submerged leaves. So you just keep cutting off any leaves that make it to the surface, and also the surface leaves (you can spot them before they even grow much, they are quite different to the submerged growth leaves).
They will happily grow in even quite low light without regular dosing of ferts so long as they can get a little bit of the nutrients they need.
Ade