RUNAS Posted May 30, 2012 Report Share Posted May 30, 2012 Im not sure if the title gives the right discription of my question but I will get to the point This came as a little surprise to me but the salinity of my tank was a little low so over the course of two water changes I have increased it (was .20 now .22) What I have noticed is that flow from the main return pump has decreased(it is pumping it 14 ft from under my house) quite dramatically. I understand that the salinity is measured by gravity but would .2 have made that much difference? It is what it is, but Im just wondering if anybody else has noticed this type of thing? RUNAS Quote Link to comment Share on other sites More sharing options...
livingart Posted May 30, 2012 Report Share Posted May 30, 2012 the term specific gravity is not the same as gravity a litre of salt water is heavier than the same of fresh water raising it .02 should not have too much effect on it if you are running a marine tank your salinity is too low Quote Link to comment Share on other sites More sharing options...
RUNAS Posted May 30, 2012 Author Report Share Posted May 30, 2012 ok being a little lazy on the typing out numbers my salinity reads 1.022 it was 1.020. Thinking that's spot on? tested NSW on weekend and thats what it read too. RUNAS Quote Link to comment Share on other sites More sharing options...
blueether Posted May 31, 2012 Report Share Posted May 31, 2012 It will be adding about 2cm in head? 4m of head of fresh water in a 20mm pipe would weigh about 5.026kg water at sg of 1.20 would weigh about 6.032kg water at sg of 1.22 would weigh about 6.132kg would an extra 100 grams make all that much difference? Quote Link to comment Share on other sites More sharing options...
Ira Posted May 31, 2012 Report Share Posted May 31, 2012 ok being a little lazy on the typing out numbers my salinity reads 1.022 it was 1.020. Thinking that's spot on? tested NSW on weekend and thats what it read too. RUNAS Interesting. When I was using NSW it was always about 1.028, while the mid range for a reef tank is about 1.026. The extra little bit of viscosity and weight from the salinity would be pretty negligible, far outweighed by things like friction in the plumbing, clogged intakes, clogged outlets, kings in the hoses, etc. Quote Link to comment Share on other sites More sharing options...
livingart Posted May 31, 2012 Report Share Posted May 31, 2012 kings in the hoses, etc. henry the eight wore hose Quote Link to comment Share on other sites More sharing options...
Ira Posted May 31, 2012 Report Share Posted May 31, 2012 henry the eight wore hose Were his men and horses any good at putting eggs back together? Stupid autocorrect guessing the wrong words, I'd turn it off but I don't have the nerve to stab myself in the forearms and hands trying to find it and dig it out. Quote Link to comment Share on other sites More sharing options...
livingart Posted May 31, 2012 Report Share Posted May 31, 2012 :rotf: Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted May 31, 2012 Report Share Posted May 31, 2012 Aint he just lovely when he gets away from the bitter and twisted. Quote Link to comment Share on other sites More sharing options...
RUNAS Posted May 31, 2012 Author Report Share Posted May 31, 2012 Theres no kinks or kings :slfg: blockages or any other changes made, just uped the salinity abit. Its not a problem, it was just a observation. Whats even weirdier that buleether noted that it would add another 2 cm of head..... thats about how much the water level dropped in the overflow. :dunno: Tank still going great 3 months on, gees these little marine fish a greedy buggers. I suppose its about time I put some pics up aye. all the best RUNAS Quote Link to comment Share on other sites More sharing options...
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