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#1
04-11-2006, 03:21 AM
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Noj,haven't thought of that question in a while but if memory serves me. I believe 1.025 is the average SG with some places lower and others higher.
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No matter how hard you try, you can't baptise cats. 
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#2
04-11-2006, 03:48 AM
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Cam, the value of 1.026 is the average SG of the reefs our corals come from. This value also corresponds to the correct values of Ca (and all other elements, really). Lower salinity means lower everything else (in nature).
I've also tested the water locally and SG is much lower. pH is under 8.0 also, mostly due to FW run off close to land. Can your prawns live in this for a while? Sure. Long term, maybe, but not optimally.
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Brad
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#3
04-11-2006, 03:54 AM
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Thanks Brad.
Our prawns are also kept in 35-38 degree farenheit water too. So the SG doesn't need to be optimal because of the amount of oxygen they are actually consuming at those temperatures. I know the Fraser River plays a HUGE role in how high the SG is between Vancouver Island and the mainland. The difference between high and low tide within 20-30 miles of the fraser is around 1.012 on flood, and 1.019 on ebb. Pretty remarkable really. All quite interesting, thanks for the explanation! Last edited by Noj; 04-11-2006 at 03:57 AM.
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