nasone Posted January 20, 2008 Share Posted January 20, 2008 what do i do i checked my sg and it was 1.029 it has been steady around 1.025/1.026 is this bad and how do i lower it Link to comment
controlsreefer Posted January 20, 2008 Share Posted January 20, 2008 it is high and you should try to lower it. take high sg salt water out a cup at a time and repalce it with fresh RO water a cup at a time and make sure the temperature is about the same Link to comment
epicfish Posted January 20, 2008 Share Posted January 20, 2008 it is high and you should try to lower it. take high sg salt water out a cup at a time and repalce it with fresh RO water a cup at a time and make sure the temperature is about the same Er what. From 1.029, I'd drop it to 1.027 and let it sit for a day or a day and a half. And then finally to around 1.025. Even doing it one cup at a time could potentially cause osmotic shock to your corals. Best to do it slowly. Corals and inverts handle rising SG better than dropping SG. Link to comment
SPS20 Posted January 20, 2008 Share Posted January 20, 2008 A good rule of thumb is to not change the S.G. more than .01 per 24 hours. Shoot for 1.025ish. Link to comment
benjad Posted January 20, 2008 Share Posted January 20, 2008 Question... HOW did the SG rise 0.04 and over what kind of period? What are you measuring SG with? How deep was the sample collected? Question: Where did all that solute come from? Link to comment
The Nomad Posted January 20, 2008 Share Posted January 20, 2008 Question... HOW did the SG rise 0.04 and over what kind of period? What are you measuring SG with? How deep was the sample collected? Question: Where did all that solute come from? Link to comment
nasone Posted January 20, 2008 Author Share Posted January 20, 2008 Question... HOW did the SG rise 0.04 and over what kind of period? What are you measuring SG with? How deep was the sample collected? Question: Where did all that solute come from? refractometer i did take sample from top of water Link to comment
SPS20 Posted January 20, 2008 Share Posted January 20, 2008 refractometer i did take sample from top of water It wouldn't hurt to calibrate your refractometer to zero with some RO/DI or distilled water, just to be sure you aren't getting a bad reading. If you drop or significantly jar a refractometer, it can cause the prism to move a little, and that will make it give bad readings. Also allowing it to get really cold or really hot will throw off the calibration. For instance, leaving it in your car for a few hours during winter might be enough to get some wacky readings. (That has happened to me) Link to comment
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