W/C's and drop in SG

[scsi]

Originally Posted by bv_reefer

i donno all i know is that i tested my RO at 1.023 three times, so thats correct, and my tank water is also 1.023...so...i should be ok

Yup... sounds good
you need RO water for your tank to replace the stuff that evaporates ( Salt stays in, SG rises)
you need water changes as part of good tank maintenance (old water SG out, new water same SG and temp in)

that Tang....... I dunno..........