Salinity Probes that work with the Apex

My spare arrived yesterday and is the exact same as the one that’s on the apex now. Glad to hear it got figured out.
 

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Just ordered this probe! We’ll see if it works for me. Hopefully they figure out a shipping method now that usps doesn’t want to ship from China
 
Just ordered this probe! We’ll see if it works for me. Hopefully, they figure out a shipping method now that USPS doesn’t want to ship from China
It works perfectly; you may end up paying an extra fee via USPS, but they relaxed the ban. They need to set up a system to collect tarries on shipments from China.
 
And this is why I love this forum. I just read all 14 pages of this.. and ordered two of them, from Alie….just to keep ready for when mine crap out again. Which is around every 2-3 years.
 
just received mine and work prefectly with apex . but do i need to remove the transparent case with 2 holes at each side at the end of the probe ? i didnt remove the end cap and just dump it in the sump.
 
I just slid the shield up and out of the way. Works fine for me.
Nice idea to sleeve it up instead of removing it. I have bio media just right below the probe so I just leave it there to protect the fragile glass since the glass probe still can reach the water. Hope it works well.
 
How long is the shipping taking on average? I have never ordered from Aliexpress, I hear people order all the time but Im hesitant
 
How long is the shipping taking on average? I have never ordered from Aliexpress, I hear people order all the time but Im hesitant
I've found their shipping time estimates to be pretty good. Just ordered one now and it says 1-2 weeks. From a few recent orders I've made, that's been about right (ordering to the UK, if that matters).
 
I live in NJ. Mine took 9 days, including weekends.
 
I’m having an issue with calibrating it. No matter what I do in the apex, it doesn’t want to calibrate using the auto calibrate feature.

I do use the manual calibration but on the second part, it stays pegged at 50% confidence and doesn’t want to go to 100%

Also after I complete after 50%, it reads 35 ppt in the testing solution however once it goes into the tank it drops to 30 (refractometer tested 34.5)
 
I’m having an issue with calibrating it. No matter what I do in the apex, it doesn’t want to calibrate using the auto calibrate feature.

I do use the manual calibration but on the second part, it stays pegged at 50% confidence and doesn’t want to go to 100%

Also after I complete after 50%, it reads 35 ppt in the testing solution however once it goes into the tank it drops to 30 (refractometer tested 34.5)
what type of refractormeter are you using?


I ended up getting a tropic marine hydrometer and use that to calibrate my Hannah salinity tester, my refractormeter and to cross check it against my apex salinity probe
 
what type of refractormeter are you using?


I ended up getting a tropic marine hydrometer and use that to calibrate my Hannah salinity tester, my refractormeter and to cross check it against my apex salinity probe
I might suggest that the tropic marine hydrometer is probably the least accurate to use for calibration (its ok for double checking a value - perhaps thats what you're using it for?) - the most accurate for calibration would be using a standard solution to calibrate your refractometer (like 35 salinity) - and then using that to double check the rest.
 
can anyone post an allieexpress link that takes you to the product. I've clicked on several the last couple of pages, and I just get a "does not exist" page over on Allie Express. Thanks
 
This is the one I bought: https://www.aliexpress.com/item/100....order_list.order_list_main.26.72c31802LOAmXY

I wouldn't say it is rock solid, at least I haven't gotten it there yet.
this is just so weird..So I click on the link you provided and it takes me to AlieExpress page, and I'll see the Probe image for about 1 second and then it goes blank and just shows me an message that says "Sorry, the page you requested cannot be found" See my image. That's all I see. Screen Shot 2025-05-23 at 7.00.23 AM.png
 
Anyone have an actual working link to this product? I'd like to order a couple Salinity probes, but every link I've clicked on in the thread is dead. Thanks for any help.
 

HOW MUCH DOES A FISH’S FEEDING REQUIREMENTS AFFECT YOUR STOCKING DECISIONS?

  • A lot! - I avoid fish that require frequent or specialized feeding

    Votes: 9 25.7%
  • Quite a bit, but an automatic feeder can change my answer

    Votes: 6 17.1%
  • It depends on whether my nutrient export can handle it

    Votes: 5 14.3%
  • It depends on how badly I want the fish

    Votes: 10 28.6%
  • Not much. I’m willing to adjust my routine

    Votes: 9 25.7%
  • Not at all. Feeding demands don’t limit my stocking choices

    Votes: 5 14.3%
  • I usually learn about the demanding feeding schedule after buying the fish!

    Votes: 2 5.7%
  • I haven’t really considered this before

    Votes: 3 8.6%
  • Something else (see my comments in the thread)

    Votes: 1 2.9%
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