Hello all. I recently set up a 6 gallon neocaridina shrimp tank. The past few mornings I have awoken to dead shrimp. The tank stays around 70-76f and the water parameters all appear fine pH 7.5, ammonia 0pp, nitrite 0ppm, nitrate 5-10ppm. I inject co2, the drop checker stays green (30ppm) and I use flourish root tabs and dose thrive s. I just bought a gh/kh kit and my tap water is very hard. 14 drops kh(250ppm) and 19 drops gh(340ppm). The gh/kh seem much higher than whats recommended but is this enough to kill the shrimp?