h2s can cause respiratory issues and red itchy eyes if you ster up the sand or move rocks that havent been moved in a while its one of the gas our tanks gives off its bad stuff. not saying thats what is for shore. but it has happend. coal miners and people with saltwater tanks come in contact with h2s i heard this and thought i would test it so i mix the
6"sand bed up in my refuge and put my meter of the water it read 5 part just a thought
Edited by kay181 - January 20 2010 at 8:55pm