About two weeks ago I bought two Zebra Snails and 6 Crystal Shrimp (4 red, 2 blue) As of today all have passed away except for one blue that's holding on. Before I get into what I believe I've figured out for myself, lets start with some numbers (None of my tests have a 0 reading, so the <0.0 numbers are basically the minimum reading my test will show*. Please don't tell me to get the API test, I live in sweden and would have to get in imported in, which would cost more than getting a different european brand that does the exact same thing.) Ammonia: <0.05ppm * Nirites: <0.01ppm * Nirates: ~2 pH: 7.5-8 Tempeture: 26C Right now I only have strips to the following numbers, so they aren't super accurate but at least give an idea. (I'll get a proper test, you don't need to lecture me, I realize that was my first mistake but I took for granted how sensitive invertebre were.) KH in tank today showed ~ 10 but this was after the snail shells had been dissolving for a few days I think (I wasn't sure if they were gone yet). My tap water that I used for water changes shows ~3 usually GH ~4 I do believe what ultimately took my CRS was soft water. They all seemed to die the same way, while trying to molt but being unable to get out of the molt. 4 of the 5 that have died I found half way out of their molt. I've heard baking soda is a fairly easy fix for bumping up the KH and GH a little? I've also heard it raises pH though and just wanted to clarify whether that meant raised the number reading (so, makes the water more basic) or raised the acidity (makes the number reading go down) because obviously I have room for a little bit of play with the pH in terms of acidity, but I wouldn't want to risk making it more basic. The Zebra snails are a little bit more of a mystery to me, since they seemed to be doing fine for a while. They moved quite a lot, but after about a week, I found them on their backs after falling from where they had been chilling, and after falling they never seem to get their previous energy back and just eventually stopped coming out of their shell all together. Confirmed their death today when one was growing algea and the other was hanging limp with trap door open. I know that snails to better with soft water also, but I'm worried that there is another factor that might have take them. Some thoughts?