I know when I tried my first, the advice I was given was to keep all the scales the same to start with, and positions too, not all work out and position correctly, but it did turn out ok using same positions for most, then add the script to the fishes, they ended up in the tank in most cases!! and it was an easy way to understand, the pits falls of fish tanks and plants
The More you scale up the more slippery them fish !
But I know Luna loves it, and she has Gills !!!