Alfredshouse is gone.....

[alfredshouse]

Nitrate was at 20( maybe from the dead fish????)!!!
Nitrite was at 0.25
Ammonia was at 0.0
SG was at 1.025
PH was at 7.6 which is really weird, I was thinking it was a faulty test, but second test kit confirms it is correct
Temperature 76.7

On Tang Daddys suggestion we tested KH and its 200mg/l!!!!!!
We are now doing another water change, we did 1/3 this morning.
If anyone has any suggestions I would appreciate them. Just dont call me an idiot, Ive already cried enough today. Thanks