Actually the fish only went in the tank 3 days ago (thread started Monday and fish added 'last Friday'), so it won't be cycled yet. Given that this is a 250 litre tank, those fish won't be raising the ammonia level very fast in such a large volume. As for the nitrate, the OP says he added a plant fertiliser.
Troptank, could you have a look at your plant fertiliser pack and see if there is any nitrate in there? It should say somewhere what's in it.
Troptank, could you have a look at your plant fertiliser pack and see if there is any nitrate in there? It should say somewhere what's in it.