Howdy,

OK, #1, I would not recommend more than two goldfish in the 20 gallon tank.
It is said that for every inch of fish, you should have one gallon of water.
However, when it comes to goldfish, they typically say 10 gallons per fish.

The reason for this is because goldfish are seen as 'dirty' fish and produce
A LOT of waste. Because of this, you may have some issues with water
clarity and algae breakouts.

Regarding keeping gravel or not, since you are a 'beginner' I'm assuming, I
would say to not put in any rock. If you want to put in a few big 2-6"
sized-rocks, that would be fine. The reason I say not to use gravel is
because all of the fish crap and extra food will get caught down in the
rocks and make it hard to get. Goldfish will also like the idea of not
having gravel because any uneaten food that falls to the bottom, they can
easily suck up and eat.

Water Changes.... when you do water changes, make sure you get a siphon and
run it along the bottom very good to pick up fish waste and any uneaten
food. This is the #1 problem in goldfish tanks; this stuff stays down there
and causes algae and other problems in the water. You will want to change,
on average, about 20%, or around 5 gallons of water every week.

Lastly, there is an aquarium 'cycling' period which can be up to 8 weeks.
This sets up your biological filter as it is called. With goldfish, I would
HIGHLY recommend that you purchase the Penguin 170 in your 20 gallon tank
that has a Bio-Wheel. This Bio-wheel will host all of the good bacteria
that will remove nutrients from the water. Again, it takes about 8 weeks
for this filter to setup.

If you ever tear down your aquarium and clean it good, make sure that you
put the bio-wheel in a small container of dechlorinated water so that at
least some of the bacteria will stay alive and you don't have to start the
8-week cycle all over again.

Hope that gives you some ideas.

Brian S.
"Syadwad Jain" wrote in message
...
Hi,
I have been reading the group for quite a while, but haven't posted
anything yet. So here it goes:
I have a 20 gallon tank which is replacing my 10 gallon. I am also
acquiring
couple of golf fish. So, i wanted to know if I should keep gravel or not?
If
not, how am i going to plant it? Also, is there any special care to be
taken
except like water changes every 2 weeks.
Any suggestions would be useful.
Thanks
SJ