sostoudt;3225773; said:your fish are never gonna deplete the column of nutrients like your talking about, making its basically mineral free. because the minerals in the food leech into the tank water. i would only worry low nutrients dangers when dealing with ro/di water.the also make trace elements you can add if you are that worried.
the estimated index sounds like just a way to improve plant growth, you dont care what they look like or grow like in a filtration scenario only that they filter water.
damn wheres the smilie with the "what he said" sign?