i been trying to keep my blackwater black for awhile but it can never last more than 4 days. im using indian almond leaves to make my blackwater. i boil it and pour it in my tank. but after the 2nd or 3rd day it completely clears up as if i have never made it blackwater. i tried dumping the leaves in there after i boil them. i tried puting a bunch of them in the filter but but in a few days it completely clears up. whats going on? and i do not have carbon in any of my filters just sponges. so right now to make my blackwater last i have to boil new indian almond leaves every 3-4 days. anyone had this problem before?