In reply to Desiree …. Shrimp need a dGH between 3 and 10 (GH of 55 to 180). A bag of crushed coral in the filter will meet this requirement very nicely and it will also bring up the KH. Note shrimp need a tank established for at least four months with some algae and/or plants growing in it. They also live only for about one year, so breeding is necessary if you want a lasting tank full. Normally even small fish can eat shrimp fry, so fish are problematic in a shrimp tank. But if the tank has lots of fine plants like Java moss the shrimp will breed undeterred by small fish in the tank. Read this article for the complete lowdown. https://tankstartguide.com/index.php/17-10-aquarium-shrimp/