I have set my new 450l (120g I think) tank up. I have taken 5 small gold fish out of my pond to cycle it. I did have a piece of sponge in my other tanks filter for about 3 weeks to get bacteria on it and a handfull of seachem matrix in there aswell for about a week. I have put the sponge in the new tank and the matrix in the new canister filter. After 3 days only, I have done my first tests, ammonia was 0, Nitrite was 0 and nitrates were 5ppm. Does this mean my tank won't cycle and is good to go or should I wait a few weeks? Also the Ph is 7.2 which it was when I put it in, so this hasn't altered, which I thought happened in a cycle.