Hello I have had my 29 gal with crush coral for substrate, and emperor 280 filter. This tank was setup on May 22, 2003 I add 9 cup of salt to the tank on that day. My salinity then was 1.010 after 5 days I have add a additional 1 1/2 cups of salt which brought my salinity up to 1.018. From what I have read is that my salinity should be between 1.021 - 1.023 if this is correct. Should I contine to add a 1/2 cup of salt every 48 hours to bring it up to where it should be?