Hey CArlos,
Are you sure it is the same tank you began with?
Initially, the centre bunch of C. Helferi (?) looked like an eyesore. Now that all the bck row plants have grown in, i must say that the tank looks very eye soothing.
i think it is a nice home for those rainbows (m. praecox?) .
my gripes are that somehow all the branches look as if they are a single piece and maybe you could have some smaller fishes. the smaller fishes would definitely enjoy swimming around in this tank