My amazon sword plant is growing good, but all of the new leaves are brown
and remain that way without turning green even when they are bigger. I have
heard that this is because of a lack of nitrates in the water. How can I
increase this? Some people say you have to add potassium nitrite to the
water...how does one go about doing this? Is 10ppm where you want to be with
the nitrate value?

THANX!!
Dave.