Added a pre mow pic, then it was trimmed about 4 weeks after that, then regrown in 2-3 more weeks.
As far as a method, Scissors and trimming just like one might with a hedge in front of a house.
Then wait for the new stems/stumps to regrow.
Keeps the mat growing nice and short/low.
Also keeps the front to back slope maintained.
"Weedy growth" is common in planted aquarium gardens, some species grow very fast, this one is no exception.
Some are slower, Anubias etc.......few would refer to that as weed. Most foreground species are fast growing weeds, so are most agricultural crops, these all can become weedy ...given the chance.
I do not think anyone here is viewing my reference to "weed" being something that any newbie would want to get rid of. Come on
Same deal with the pic complaint. Anyone can see the regrowth, regardless of saturation level, and the pic quality details are not the point really, just the general method "how to trim" a foreground. Fast growing plants = weeds/potential to be weeds. Means they can be trimmed aggressively and are not delicate dainty things like a mame bonsai etc that need more horticultural care. Mow it like grass or a hedge and be done with it.
Do not over think this.
Regards,
Tom Barr