Natural Sea Water

reeflooker

Member
Does anybody use natural sea water for water changes? I once met a marine biologist reefer and he said it is ok as long as you filter it first. He was not specific about what he meant by the word "filter". I assume the he meant UV and and possibly a 20 to 100 micron mechanal filter.
Also, I have heard that sea water has lower levels of calc (below 400) than what we shoot for as reefers. Has any one tested the parameters of sea water?
 
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