| | Re: Elements of Aquascaping
Since you said you need a better word for "correctness" maybe compatability would work.
I would also include cleanliness and health of plants in the list. I've seen some good layouts that don't look anywhere near as good as they could if the plants were in better health and if the tank was cleaned up a bit.
You should take a look at the AGA website under the aquascaping contest section it has a list of what the judges look for in the contest photos and how much wieght each section has (i.e. overall composition 40% ect...)