Suspended Particles

>They made my tank very brown initially before the carbon in my Fluval
>started to work. Do you have peat or driftwood in your tank? 


I soak a peat filled nylon bag in my water.  Just started doing it so I 
haven't perfected it.  I need to find a big steel kettle to boil my peet 
though. I noticed an oily skim across the top of my water.