W/C's and drop in SG

[Aquattro]

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

K, trust me, RO is NOT 1.023, not ever. Salt water is 1.023. RO, which is pure H2O, has a specific gravity of 1.000 always, or it just isn't pure water. I'm not making this up, it's basic chemistry. If your hydrometer says your RO (from filter/store/wherever) is 1.023, it's broken. We can't discuss this, it's just fact. Or, someone in your house spilled a lot of salt in your RO bucket.