I bought a nice piece of bogwood on Sunday, its a large piece for my 78 gallon. Dnt hav a big bowl to boil it. So I kept soaking from Sunday.it release a lot of tanin. I change the water every 12th hr. Now the tanin levels r lower bt it stil creates a foggy water after a few hr of adding new water. Wat should I do? How long I'll hav to wait? Can activated carbon help in this issue? Please help...thanx