I think the poor design of plastic plants is market driven. It's what people want - stylized versions of plants.
After all, if you want a natural look, it isn't very hard to learn how to grow the easier live plants. Algae can be managed. Eventually. And the importance of live plants in a closed system is well researched and supported.
But if you like the look of plastic plants, then you have no need to go beyond them. You probably don't care if they look fake. When I was in my teens, I had a few realistic plastic plants that I mixed in with live ones, but I haven't seen any of that quality in many years. I assume they became too expensive and couldn't compete with the dollar store versions. Plus, as good lighting became cheaper and easier to get, real plants are far more popular than they were in the glory days of fake.
After all, if you want a natural look, it isn't very hard to learn how to grow the easier live plants. Algae can be managed. Eventually. And the importance of live plants in a closed system is well researched and supported.
But if you like the look of plastic plants, then you have no need to go beyond them. You probably don't care if they look fake. When I was in my teens, I had a few realistic plastic plants that I mixed in with live ones, but I haven't seen any of that quality in many years. I assume they became too expensive and couldn't compete with the dollar store versions. Plus, as good lighting became cheaper and easier to get, real plants are far more popular than they were in the glory days of fake.
