Aquarium salt doesn't make the water soft. How did you get to this statement? Loaches don't require salt nor will you see their habitats with salt at all. If I were you, do plenty of water changes and stop adding aquarium salt. Aquarium salt is a complete waste of time and money. If you study the osmotic shock and osmoregulation, you will know why long-term salt becomes harmful more than you can imagine.Rockbass6;1841612; said:I have wellwater here and I add aquarium salt to my loach tank to try and keep it softer I have had no problems keeping the loaches at all.