Too many water changes? My local fs is down the street from where I have classes and they have seawater so getting water is not a problem. Is doing a 5 gallon change on a 20 gallon tank once a week too much? Can you cange water too much? I know that this may lower calcium levels but if adding natural sea water I would think that this wouldnt be as much of a problem, plus i supplement with purple up daily. |