Finally it is done. It took me and my husband 2 hours to clean the fish tank , wash the stone and change the water. When we bought this tank 4 and half years ago, the sales person suggested us to change water every 2 weeks.
Forget about it. Too much work, then we change the water once every month, sometimes even one and half months. Too lazy.
I remember it cost 17 cents each to buy the golden fish in pets mart and we bought the fish tank there as well.
My son bought green tigers and regular tigers and some other tropical fish, some lived for a few months and some lived for maxmium one and half years, then the tropical fish all died.