I imagine that most of this has challenged as it`s nearly 10 years old.
Is it possible that plants grow better when we dose the water colomn because it`s much easier to do and do consistently? t`s hard to keep adding nutrients to the soil. Easy to make sure they`re in the water colomn.
Obviously, long term, water colomn fertilization is a much more sustainable method, but short term, assuming all the nutrients are provided through the substrate, do the plants still do better with plain gravel and fert in the water?