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Hi Hugo, and welcome to APC! Your tank looks great.

The only way I've found to control aerial growth on the species you mention is to prune them. You are absolutly right--once they reach the surface that is all they want to do. A drastic pruning will usually result in production of only submerged leaves for some time.

I think your stem plants may be suffering from shading by surface growth from other species. Try to keep the water surface free from floating leaves. Also, try pruning the tops of stems and replanting them. This will make the clump more dense at the bottom, and the cut stems will usually put out several new growing tips.
 
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