No only use ro
water only... ro
water has 0 (ppm
)parts per million of total dissolved solids, tap water has an average of at least 127 ppm
of total dissolved solids this is the bad stuff, plus using dechlorinator will affect a skimmer where it will not work efficiently a skimmer is a must in a reef tank.... You can test ppm
with a tdi meter they are about $15 on ebay.