Straw cylinder landscaping is not creative and doesn't know the rules. You can build this structure according to Bian Xiao's method. The basic routine is, near big and far small, near low and far high, or near high and far low. The placement of stones or sinkers should extend according to lines.
The fish tank is divided into three areas with Qinglong stone, and the gaps between the stones are filled with gravel. The purpose of this is to distinguish between water grass mud and cosmetic sand, so as to avoid the difficulty in distinguishing when the tank turns later. Fill both sides of the fish tank with aquatic mud to facilitate the later planting of aquatic plants. The thickness of the grass mud at the bottom of the fish tank should be at least 5 cm or even higher. You can also prepare some volcanic particles and spread them under the aquatic mud, which not only activates the bottom bed, but also saves the amount of aquatic mud, killing two birds with one stone.
Placing azalea roots above Qinglong stone is to create the feeling of forest. Put them along the stone, preferably in the order from high to low. In order to make the fish tank landscape more special-shaped, we need to modify the roots of rhododendron, and we can stick some hair roots on the roots of rhododendron to form branches, which is convenient for sticking moss and making crowns in the later stage.
Now fill and smooth the empty space of the fish tank with cosmetic sand. If you don't have a brush, you can level the sand with an algae scraper.