I know this probably sounds crazy, but I've got a large koi pond in my backyard and I'm setting up a planted tank and I was wondering if the substrate in the pond could be used as a substrate in my tank? I know this won't work but I'd like to know why. I can't seem to find any nutrient rich substrates at my lfs.
FJ
the nutrients you are looking for in a good substrate are nitrates, potassium and phosphorus.+ trace elements, all the pond substrate will contain is nitrates, so obviously this wont be as good.. you can buy good planting substrate from good plant-tank retailers... aqua essentials and the green machine i belive oliver knotts nature soil is the best plant substrate on the market, but it all depends on whether you want to pay the price.