Hey guys! Its been awhile since my last post. I had a few things to talk about
1 is I still have a 90g rr tank stand and 100 lbs of base rock that needs to be recured for sale.
If interested call or text or email me
302 442 three63nine Jimwhitby@sprint.blackberry.net
The other is have you ever heard of salinity levels being different from sump to dt?
My filter is like a trickle not a strong flow thru sump/fuge. My salininty level are different by 2 points
Just curious if someone else has experienced this.
Thanks in advance
Hope all is well with everyone and there familys thru this hard time
I’m with Jon - I have never heard of salinity being different. At least not by that small of a margin. I’d imagine if you added a cup of super saturated SW to the sump and there was no to minimum flow then you could have heavier salt water sitting stagnant under lighter water but I think it’d be highly unlikely.
Hey Jim, hope all is well! I have never heard of difference in SG from sump to display either. Very weird, but then again, I have never checked the SG in both at the same time.
Salinity should be the same unless top off water was added recently or the pump and the DT are not truly connected because the return pump is not pushing much water. Then with evaporation there could be a small difference
If your heater is in your sump, the increased temperature allows more salt to dissolve per gallon of water than it does in the display. When the water is pumped back up and cools, the level of sG adjusts to equal to the display water.
Joe
PS- Glad to see you back, I thought maybe you moved.
[quote=“Jocephus, post:7, topic:1630”]
My hypothesis:
If your heater is in your sump, the increased temperature allows more salt to dissolve per gallon of water than it does in the display. When the water is pumped back up and cools, the level of sG adjusts to equal to the display water.[/quote]
True temperature can affect the salinity(and depending on the instrument used to measure can affect the accuracy of the instrument), but consider that many people keep their heaters only in their sump. If the temperature is significantly different between the display and the sump, enough that affects salinity and would probably be noticeable to the touch, then it is also slow enough that the difference in evaporation rates would also affect the salinity.
Bottom line, double check your instrument used to measure(hydrometer/refractometer) and make sure water is flowing up and down from the sump.
I would expect any small differences in sump-DT to be so small and would acclimate quickly enough it wouldn’t be noticable/measurable. I would assume error in measurement due to something, what I dunno.
[quote=“Jocephus, post:7, topic:1630”]
My hypothesis:
If your heater is in your sump, the increased temperature allows more salt to dissolve per gallon of water than it does in the display. When the water is pumped back up and cools, the level of sG adjusts to equal to the display water.[/quote]
True temperature can affect the salinity(and depending on the instrument used to measure can affect the accuracy of the instrument), but consider that many people keep their heaters only in their sump. If the temperature is significantly different between the display and the sump, enough that affects salinity and would probably be noticeable to the touch, then it is also slow enough that the difference in evaporation rates would also affect the salinity. [/quote]
I think this is the case, I wonder how many people measure the salinity in bith locations. ANyone want to log your results?