I finally found out the reason my inverts were dying. I was using a digital refractometer and read that they need constant calibration. I hadnt calibrated mine since i got it about a year ago. I didnt have any calibration fluid so i just went with what it said. I just got my manual refractometer and got the calibration fluid with it. I calibrated it and tested it on my water. It was at almost 50 ppm
and thats about 1.048. I had also bought a copper test and it came out negative. I tried the testing fluid on my digital refractometer and it was waaaay out of wack. I put in all the freshwater i had and ill be getting some more tomarrow. What a relief.