So is the trimming method replanting tops mostly and pulling bottoms or combination of the two.
That's a great question and something we should discuss and focus on more. Trimming, pruning, and plant mass management is an important part of the equation.
Today was a lot of pulling, topping, and replanting. The big ones in the back like the Cuba, P. Kimberley, Macranda's, Pantanal, etc. get pulled and thinned out. I take them all out and once and give that area a good vac.
If I need more, I will leave a few of the bottoms planted. But none of that today.
Then you have plants like the Lobelia Cardinalis "Mini" in the front right that get too thick and bushy. They will eventually start too choke themselves out. So I pull those and split them into smaller plants, removing a lot of the older larger growth. Basically give them a fresh start with less mass.
I usually just pinch some tops of the Nymphoides Hydrophylla 'Taiwan' in the back left corner. But today it came out and really go thinned out. No worries hacking it hard, it will grow back in no time.
The group of Syngonanthus Belem in the front right needs a good trimming about every three weeks. Today it all came out. There are loads of new side shoots when you let it go, and again it gets too thick. So those get pulled and about 1/4 of the stems get removed. They grow better when they have some room to breathe.
The only tall one I didn't pull today was the Cabomba Furcata, as I just ran out of steam! Might even trim them down over the weekend to get everything back in proportion.
I've said this before, but the tank responds very well to a good trimming and removal of mass. The plants always seem to enjoy a little extra elbow room.
I'll have to do a more proper post on the whole process sometime like I've done a few times in the past.
And I think it does demonstrate something. When you learn how to grow plants.....they grow! So be careful what you wish for. A high light high tech tank full of stems is a hands on project. If you don't enjoy the process, the hobby may not be for you.