Hello

I bought a 10 gallon aquarium 3 weeks ago, and four 6month old
goldfish. As probably anyone who has no clue about aquaria (and doesnt read
first, I filled
it with tap water, added some plants, dumped the fish inside and fed them.
Everything was ok, untill second or third day when the water turned green
and unclear.
(Weird !) I changed the water, cleaned everything up....
The fish were happy, untill 2 days later ... You get my point.
Then I read on the net about "cycling the new aquarium". Every site I've
been to, they had different
views on how to do this..

So what I did was this:
1. Installed a filter, and a air pump. Let them running most of the day.
2. Keep the same (unclear - green) water inside, and change only 10-15%
every 3-4 days.
3. When doing this, I cleaned the gravel and stones with tap water, and
vacuum the bottom.
4. Put back the plant, gravel and stones.
5. Treated the new 10-15% water with de-clorinater
6. Fed the fish 4 times a day.

I dont know if it supposed to be like this, but the water is so unclear that
I can barely see the
fish on the other side of the tank (10 Gal!).
Every morning I get up, all the fish are at the top gulping half water, half
air (After turning
on the pump they seem ok).

What am I doing wrong ? What is the things that I should do or not ?
Is the water suppose to be THAT green and unclear (after almost 2 weeks)?

Any help would be much appreciated