I set up a blackwater tank yesterday, and after a bit of confusion at the lfs I ended up with an "Anubias" that was actually a type of Sword. I figured I'd continue dosing ferts in hopes of keeping it alive lol. Anyways, so I added a mix of the appropriate amount of Excel, Iron, Flourish, and Prime. (all Seachem) Shortly after, the tank was BLACK. I can barely see the driftwood that sits in the middle of it lol. Is this normal/is it a problem? It doesn't seem to be bothering any of the stock but as I have some very sensitive fish I don't want to cause problems. Of course, because I just mixed them all together I can't tell which one actually caused it.