Flying star #2

Dear Cecil,
Congratulations to both You & Robert for hosting 6 years of Free Advice Forum. Very educational & interesting forum. Can you please give me your views on the following:
I have both a study room & master bedroom in the South Sector with #2 in a Period 7 house.. Both have #6, #2, #8 flying stars.
1. This study room is in the South Sector with #6, #2 (base) & #8 stars. Both my children's (Kua 1 & 6 are studying here. They are not doing well in their studies. I have put water plants for #2 & porcelain pagoda ? helps children?s study. How can I use fengshui for their education? Can I put a bubbling water tank or rear fish in this sector to reduce #2 & tap the yearly #1.
2. Since water is not suitable for a master bedroom with #6, #2(base) & #8 stars. Will a 6-coin sufficient to control #2?
3. If a master bedroom in a West sector has #9, #9 (base) & #5, stars, can we paint the bedroom dark blue to control #5 & hang 6-coin too?
Thank you very much.
Regards
Wincash