yeah i like the darker water i think it gives the tank a little more natural amazon look to it, but some people just dont like it, if you hate it then boil the wood and all the tannins will come out but if you like it then just do your regular weekly water changes and the water wont get too dark, im actually trying to buy a new small piece to add into the tank since my pieces aren't really leaching anymore and it doesnt get as dark as i want it to anymore, but this took like a year but my pieces are pretty big and i even got them used from another member who had them in their tank for a couple months and they still leached that long for me, so if you dont like the color i would definitely boil it cus otherwise they will continue leaching tannins for awhile, especially if they are large pieces