Your English is just fine. :thumbsup:
Choice of tubes is a personal thing but this is what I recommend:
5xATI Blue+
2xATI Actinic
2xATI Aquablue Special
1xATI Coral+
With above tube combo you will hit all the spectrum possible with T5's and still have a decently bright yet plenty blue look.
Space tubes out more of less equally with coral plus in middle, and ABS tubes either side a few tubes away.
If you have an ATI unit, run 2 tubes around 9-10 hours as dawn dusk.
Run all tubes around 6-7 hours
Keep fixture about 8-10 inches above water line.