weetat wrote:

Hi all ,

I have just bought 3 gold fish and introduced to my tank.
My question is what the best enviroment and biological for gold fish.
Present , my tanks setting is :
pH : 6 - 7 KH : 10

Any suggestion is much appreciated ? Thanks.

Get your PH up to about 7-8, KH is also far to low - adjust slowly, although
raising PH is not as stressful
as it is dropping. Temp around 65-80, ensure they have approx 30 gallons (10
gallons per fish)
Over filtration (bigger the media space the better). Do 25% water changes (or
whatever helps
keep your nitrates less that 40ppm, preferably less than 20ppm).