Since I've owned my fish, I have been mixing my water with half of my softened inside water and half of my hard outside water. The gh/kh is currently around 7. My current problem is I hurt my shoulder and using 5 gallon buckets to fill a 55 gallon is getting old. I would like to use a python. My only concern is whether or not I can safely go directly from a 7 gh to my inside water, which is only 2 gh. Is anyone 100% sure this would be ok? I just don't want to lose my livestock over something so silly. Thank you