False for aquarium (bottom filter)
Aquarium cleaning: false or pseudo bottom
False in the aquarium
I do not really understand why such difficulties ??? and your FALSE will withstand a layer of soil in which the plants will grow? and on the lumen of the aquarium, the two-layer structure of its bottom will be seen ... some idea that does not justify itself. And most importantly - with an empty bottom. not loaded with soil and not reinforced, you get just a fragile structure, especially at 500 liters. And yet - you imagined how many stiffeners should be placed between these bottoms, so that the upper one would not burst under the weight of the ground and water ???))) and all these ribs will hold dirt on themselves ... well, I don’t know ... I wouldn’t advise somehow not cool ... A bunch of options to make beauty without such problems))
The idea is very good. Plants will grow great. With such a volume you will have to clean your aquarium about once every 2--3 years. And why do you need such troubles? Actually, they did it before, when good equipment was in short supply. Just when the time comes (and it comes) to clean the tank, you will have to pull everything from the aquarium, and the volume is not small. With such a volume, it will be easier for you to siphon the soil once every six months.