Hi all,my friend gave me his live sand since he stopped with the hobby....and coincidently i found that in the live sand there are very tinny metal particles! these were found cause my glass cleaner magnet fell in the bucket and when i picked it there were tiny black particles with...
what is the difference between Salinity Refractometer 0~28% and Salinity Refractometer 0~10%?
which one is the best for a marine tank!?
i found very cheap Refractometers from ebay! especially from china!...what is your review regards this!?
Thanks
Daniel
