There are many places where one can purchase cheap plastic aquarium plants. One can purchase cheap plastic aquarium plants at popular on the web sources such as PETCO and eBay.
In one case yes. Only if you have live plants and fish in it. Because the fishes waste falls down to the bottom of the aquarium and the plants roots use it for nutrients. In result, you have a lively, green tank! Hope I helped. Cheers! -Sarah
You don't need one if there is light in the room from a window or some other source unless you have live plants
There are special fluoro tubes that are made for growing plants. One brand that comes to mind and does a reasonable job, is easy and reasonably cheap to get here in Australia, is "Growlux".
One can get professional help in growing and maintaining aquarium plants at many pet stores. Petland and PetSmart both have the required essentials for aquarium plants. On the Aquariumplants website, one can find many useful tips for on plants such as Anubias and potted plants. Tips are also included for planting in various bowls and tanks.
The simple answer is yes. A balanced aquarium should contain water plants and these need light in order to live and grow. If your aquarium is a tropical one then the lights should be on for around 12 hours daily.
One can purchase an aquarium background from Amazon where there are many available for around $10. One can also buy such items online from eBay or Petco.
A little known secret is that often pet shops carry aquarium plants. They may be more costly than getting them from major retail chains but they look better.
One can buy the supplies for an aquarium from a number of places. Independently owned pet stores will offer the supplies, as will as larger chain stores like PetsMart or PetCo.
Aquarium
If you are keeping one in an aquarium, they will eat fish food. If you have plants in the water they will eat those leaves. You can get plants for the aquarium at a Pet Store.
I have a 75-gallon freshwater aquarium with several different species of plants. The one I found to be very popular and easy to grow either in the substrate or just let it float is water wisteria. My fish love to swim underneath the floating water wisteria. I wrote a paper on aquarium plants at the link.