Select the plants you want to grow. It pays to do a bit of reading at this point, so check out aquarium forums and elsewhere. Consider the tank size, the scene you wish to produce and the size you want your plant(s) to be. Remember, plants grow! Want something with lots of leaves, or more of a moss? How about something your fish will be able to eat?
I assume your nominal 15 gallon tank is 24"x12"x12". It will actually hold a tiny bit less than 15 gallons filled to the brim. If you have 1 inch of gravel for plants to grow in and fill to within 1" of the top, the tank will hold 12.46 US Gallons.
Dead or dying
They want feeding.
to eat food
There are no plants at the top of Mt. Everest, it is too cold for anything to grow at that altitude.
food flaots
opline gourami, guppies ,hatchet fish
Some fish prefer swimming at the top of the tank while others the bottom or middle.
Could be anywhere.
To decorate it!!
The first thing I would say is, "if you want what's 'best' for your goldfish, you will get rid of the bowl and get a reasonable sized tank/aquarium." The basic rule is 1" of fish needs 1 gallon of water. Goldfish (are really a pond fish) grow to around 12" in captivity so the minimum sized tank you need for one goldfish, (allowing for substrate (for plants to grow in) and about 1" space at the top) would be around 18 to 20 gallons. They like to nibble on all the 'Elodia sp' of plants. Myriophylum, Cabomba and Ambulia are also enjoyed but their favourites are definitely Elodia crispa and E.densa.
well it has to have light if you cover only the top it will be ok:o