Hi, have a 24 gal nano cube..35lbs LR, 40 lb LS, watchman goby, coral banded and pistol shrimp, purple pseudochromis, 2 scarlet reef hermits, 2 turbo snails, 2 emerald crabs, serpent star, 2 ricordia shrooms, and 1 umbrella shroom........LFS sells RO/DI water, but salinity = 1.027..They say...