Thanks.

I can't vacuum gravel, I have plants. Specially it was very difficult for me to start them grow the way I want. I did keep the driftwood in boiling water, then in tap water for 2 weeks, just to eliminate the water coloring.

To be honest, the horrible smell is gone after series of WC.
There is some smell present there, but I think it's normal ... correct me if I am wrong ...

In tank I have:
Fancy Guppy - 5
Cory Peleatus - 3
Caridina japonica (algae eaters) - 2
Snail - 1