I don't have an ammonia tester, sorry. I will go in to the LFS and have them test it though. And the fish have already been in it and the bacteria has been set up - so hasn't it already been cycled? And don't worry, I won't be adding any more fish anyway. Also, the temperature is fine (24oC).
And thanks for the heads up! I don't think she suggested out of the blue though, it was me who asked her if that was the problem because I googled "Why are all my fish going up to the top of the tank?" and that's the explanation that I found. The filter was all clogged up though so we have cleaned it out and there's bubbles coming out the filter now and the fish are back to normal. I'm just crossing my fingers that everything stays that way.
And thanks for the info! I have read about everything I found though (and have read through several books that I bought as well), but you're definitely right as there isn't really a limit to what you can know about fish I guess.
And thanks for the heads up! I don't think she suggested out of the blue though, it was me who asked her if that was the problem because I googled "Why are all my fish going up to the top of the tank?" and that's the explanation that I found. The filter was all clogged up though so we have cleaned it out and there's bubbles coming out the filter now and the fish are back to normal. I'm just crossing my fingers that everything stays that way.
And thanks for the info! I have read about everything I found though (and have read through several books that I bought as well), but you're definitely right as there isn't really a limit to what you can know about fish I guess.