[bmward64]

Recently my LFS closed down, along with their livestock tanks, they had four tanks of various size set up that they used solely for display. One of the was a 46 gallon tall with a back back filter and a hang on back power filter that was about two years old. I bought the whole thing, water, sand, lr, filters, tank, stand, light, and heater. I also bought a deep 6 hyprometer to of course test the salinity, but it seems that it varies all the time when I test it, and when I mixed my first batch of salt water, it was perfect, 1.024, but when I went to do the water change a two days later it was at the low end of the spectrum, to low... What happened?