I put 0.1 as the nitrite reading as the test only goes down to this and I wasn't sure if I could see a colour or not? The tank has been running for 4 months, the filter was matured as I bought the tank already stocked and I do wonder if any of this was already a problem as the chap gave me 2 bottles of whitespot treatment when I picked the tank up.
I'll assume that the nitrite reading is accurate, I took it just before the weekly 40-50% water change which I upped to abt 60% yesterday. Ialso removed all the hardscape and cleaned everything I could find from the substrate (which wasn't a huge amount really).
If I have had ammonia and nitrite readings of 0 for the life of the tank, where are the nitrites coming from? I thought that they were a product of ammonia? I cleaned one of the filters whilst doing the water change yesterday and the coarse sponges were very dirty,so could this be the cause? I have a fluval 405 and an Eheim 2026 on the tank.
I keep finding a large hole in the front lhs corner every morning, I assumed it was the clowns digging the hole,but if the corys are then snuffling about in it it could do some damage I guess...