Yeah, I’d say you’re fine in terms of GH. I had a similar problem where my fish were dying all of a sudden and I found out it was because my GH was ridiculously low.
For a while I have had a few struggles with my freshwater aquarium. In the past I had issues with general hardness as my water source had absolutely no mineral content and it led to a lot of fish loss, especially since my local pet store had an extremely high water hardness level. I eventually...