ESV-BIonic 2 Part Raising Salinity

[ReefCowboy]

Have been using the two part for about 2 months, and when doing water changes, always mixed the salt on a 1.025 salinity. Things in the tank have been extremely good, so i relaxed a bit and wasnt checking on salinity as much, just filling regularly my rodi top off contained every week.
Today grabed the refractometer and my salinity is 1.030!

I couldt believe so i calibrated the refractometer w rodi and testing again...1.030...
Ive heard of such thing and even though dont quite understand why it equals higher salinity, know that is why it went up, being that my top off always works on the clock.

Im doing a maintenance 25% wc and glad i caught this issue before mixing the new water batch. The new water to be going in is at 1.024 so i guess it will be bringing the overall down by a bit. Next week ill do a bit more.
I figured lowering salinity lets say down to 1.026 at once could be a big stress to the sps, am i correct?
Advices on this really welcomed.
Thanks

 

[rk_tek]

I believe it is ill advised to drop salinity more than .002 per day. As to why 2 part is raising salinity, I don't know. How much 2 part is being added, if in large quantities, it could be replacing top off water and slowly raising salinity.

 

[Portsie]

Just a heads up. I had been using rodi to calibrate my vertex refractometer but recently was putting in a BRS order so decided to throw in some pinpoint calibration fluid. Turns out my refractometer was off by about 0.004.

 

[bertoni]

I'd lower the SG over 5-6 days or so, to avoid any shock.

The two-part will raise SG because it contains calcium chloride and sodium carbonate. The calcium and carbonate are consumed, leaving NaCl, table salt.

 

[JohnL]

Old post that describes exactly what I found out today. Just a heads-up to keep an eye on salinity when using B-Ionic.

 

[Anemone]

Old post that describes exactly what I found out today. Just a heads-up to keep an eye on salinity when using B-Ionic.

Yup, been using B-Ionic for years, and yes, S.G. creeps upward.

Kevin

 

[Vinny Kreyling]

Good to know as I plan on using this method when needed.
As far as lowering salinity, no worries doing it all in one shot.
When I did maintenance & there was ick we would drop from 1.0221 to 1.010 in one shot.
RAISING IT however has to be done slowly.

 

[Genetics]

I’m not sure of the quality of refractometers these days but noticed a significant difference between zeroing with RO and using a 1.026 standard.