Wow, who sold you a 9L "tank"? Do you still have the receipt? I would seriously consider taking that back. I can't think of any species of fish I'd keep in that tiny a volume.
A fish tank takes 2-6 weeks (not 3 days) to complete the nitrogen cycle. But in a tank that small it's going to be forever unstable.
I would really suggest returning that thing and getting something over 40L-50L, it will be far more rewarding in the long run, and easier to care for too!
edit: Dax, a tank will not ever be ready in 3 days unless you've cloned the filter from another established tank. The 3 days thing must date back to old fishkeeping ways in the 70s and 80s when the understanding we have now about water chemistry was still in its infant stages.
Your tank won't hold healthy fish, I really would recommend a larger one!
A fish tank takes 2-6 weeks (not 3 days) to complete the nitrogen cycle. But in a tank that small it's going to be forever unstable.
I would really suggest returning that thing and getting something over 40L-50L, it will be far more rewarding in the long run, and easier to care for too!
edit: Dax, a tank will not ever be ready in 3 days unless you've cloned the filter from another established tank. The 3 days thing must date back to old fishkeeping ways in the 70s and 80s when the understanding we have now about water chemistry was still in its infant stages.
Your tank won't hold healthy fish, I really would recommend a larger one!