when I say salt I mean that "aqualibrium" stuff. I've always used it in all my previous set ups in minimal doses as a buffer, stress help, and disease prevention. and it's good stuff. You just replace what you take out.
It's just that this time round I added it to the conditioned water before adding to the tank which I've never done before.
Like I said it's just a theory.
Just checked the water and its still as normal.
PH 6.4
Ammonia 0
Nitrite 0
Nitrate 10-15
Fish are fine. I'm thinking It has to be some sort of "dust" From something in there. Either the Bog wood, Stuff trapped in the roots of the Lily ( all though I fully washed this, and cropped them short)
Or I was a bit too vigorous when vacuuming the gravel/sand.
It's a mystery.