Shan

Yes it was nitrite I have the problem with. The chart I use has the level as 4.0 which I think is different to the ppm you referred to. But according to my chart it is as bad as it gets . Thanks for your advice though, it helps a lot. I have only had my tank three weeks so it is still establishing the nitogen cycle. I have just done a 50% water change and will measure the level again in a couple of hours. If it doesn't get any better I may just have to use rain water or something, there is plenty of it around at the moment I will get there in the end, its just a huge learning process and I haven't found a really good book with all the answers yet. Thank goodness for this web site and others.

Hi I am new to this list and to the world of aquarium fish. I have a problem and I need some advise. I have a high NO2 level in my tank and am trying to get it down by changing the water. I have so far taken out 30% of the water twice in one day and the NO2 level is still really high. My question is can changing the water several times a day be dangerous to the fish? Should I be taking out more than 30% at one time ( I have a big tank and it isn't fully stocked yet)? Please help I feel like I am stuck between a rock and a hard place. I know the water is really bad for the fish with a high NO2, but I don't want to kill them by stressing them out with water changes.