Hi,
I have had our tank since 23rd April 07. We have had a number of losses, but this may have been explained by overcrowding. I have just taken a reading and have found the following:-
PH = 8.5
Ammonia = 0.1
Nitrite = 4.0 mg/l
Nitrate = 50mg/l
I know the latter two are dangerously high, and...