There is nothing to suggest there is a water problem. Nothing has changed, Like I said this puffer had one small white pimple for many months and then in just a few days he has them all over his head and a few on his belly. When I got home today he looks a little better but there are still some pimples.
Just FYI, water is:
PH 6.8 (6.0 with co2)
KH-40ppm
GH-60ppm
nitrite/ammonia- 0
nitrate 10-20
dosing- phosphate, potassium, nitro, iron and trace elements.
Temp- 78°