By far the worst part of having a heavy planted tank, for me anyway, is having to prune the plants every week, usually replanting a lot of the cuttings, thus getting a still more densely planted tank, and soon finding that the weekly pruning is impossible for me to do to my satisfaction. I solved this by planting almost the whole tank with ground cover - dwarf sags in my case, then only a few high growing plants. This reduced my pruning by a factor of 10 and I enjoyed the tank a lot more for a lot longer.