1.034

[JDS]

That's what my new refractometer was reading. Funny thing my old swing arm was reading 1.025. That would explain why my protein skimmer was working extra efficient lately. I don't know why I waited so long to get one,stupid me.

 

[Dave ESPI]

have it calibrated ?

1.034 is TOXIC and highly stressfull to much of the reef stuff we keep. if it is an accurate #, I suggest lowering it very very slowly.

* like a few points a week

 

[jdieck]

Yes calibrate just in case. If you do not have a known saline reference solution at least use some distilled water to calibrate the refractometer to zero.

 

[JDS]

It said I didn't need to calibrated because it was factory calibrated.

 

[JDS]

I think maybe I will calibrate it. It comes with calibration fluid.

 

[JDS]

Well I checked the calibration and it was calibrated correctly. So I lowered mighty specific gravity down to 1.030. tomorrow tomorrow I'll bring it back down to 1.026. How does that sound?

 

[TA]

<a href=showthread.php?s=&postid=7078416#post7078416 target=_blank>Originally posted</a> by JDS
How does that sound?

Sounds too fast! :eek2:

 

[JDS]

I hope is not too fast!! Because I already have done it. I didn't do it all at once, I did over a course of a couple hours. I guess only time will tell.

 

[Ken668]

When lowering from that high of a level, you should be thinking a week or 3-4 days at the minimum. Even a couple hours would be very stressful. I'd say 0.002 per day would be adequate.

 

[reefD]

yeah since you already made a fast adjustmen...wait a week to make any other corrections.

 

[jdieck]

I do not think you will have an issue, we do it all the time when aclimating. Just try limiting the adjustments to no more than 0.01 every 6 hours.

 

[reefD]

i agree with jdieck but is it not uncommon to loss a coral from acclamating it to your tank? it happens from time to time and we are speaking of your tank and im sure you care about everything so go slow to ensure no issues. im just saying if i acclamate a hundred species of something a percentage will not survive due to not tolerating the acclamation. my point is to avoid this possiblity and go slow! heck i have taken specimens and acclamated them from different salinities with no problems but that doesnt mean the possiblity of an issue doesnt exist when acclamating new additons. but in the case of normal inhab. dont go fast as everythin is in a tank not abag and can be fine for weeks,we acclamate new addir=tions fast cause we have to in order to get them into a tank asap.

 

[Ken668]

jdieck, it's true that we stress the corals a little every time we acclimate them, but going from 1.024 to 1.025 is a lot different than going from 1.035 to 1.025 (or in those ranges) These are actually major salinity changes, and stretching the acclimation period out as far as possible is recommended.

 

[TA]

1.025 hydrometer vs. 1.034 refractometer is a huge difference. Calibration fluid or not, I'd like a third opinion! Hope you didn't just drop your salinity down to 1.016.

 

[Rainer Feyer]

I certainly agree with TA: Take a sample to your LFS and see what they get. You could be upsetting your whole system!

As for salinity drop: Go slow! Since they have tolerated 1.03+ for this long, a gradual and slow decrease should be of great benefit.

 

[Dave ESPI]

I suggest lowering it very very slowly.

* like a few points a week


Way to read the advice posted there OP...............


Hope your tank doesn't suffer a crash, or massive bleaching effect.

 

[xian]

Jeff how did you make out?

Not pleased to say I had the same result when my I recieved my refractometer this friday.

I'm going to start bringing it down but I'd like to know if anyone has any calibration fluid (mine didn't come with any) or knows where I can get some.

 

[reelfreak]

Shouldn't the SG of RO freshwater be 1.000?? That's what I tested mine against (no fluid either).....

 

[jdieck]

<a href=showthread.php?s=&postid=7139680#post7139680 target=_blank>Originally posted</a> by reelfreak
Shouldn't the SG of RO freshwater be 1.000?? That's what I tested mine against (no fluid either).....

In a refractometer should be 0.000 thet is a way to calibrate the low range unfortunately the refractometer span may give a false reading at the 1.025 if not calibrated in that range.

a solution of 37.9 grams of Morton salt in one liter of RO/DI or distilled water shall give you a reading of 35 ppt.

 

[Dave ESPI]

.

a solution of 37.9 grams of Morton salt in one liter of RO/DI or distilled water shall give you a reading of 35 ppt. [/B]

Iodized or Kosher ? :rollface: