refractometer

All items were used for less than a year, available for pick up in Arlington: Quantum Nyos 120: 250 Tunze 6055: 100 AI Nero 5: 125 Milwaukee refractometer and case: 100 Eheim Jager 150 watt heaters (1 new and 1 unused): make offer TDS meter, Ph tester, Phosphorous tester (all digital): make...

I've been calibrating my refractometer with RODI for the past 2 years. I now know that it's best to calibrate with calibration solution. I want to switch to calibrating with the solution with my next water change, but the problem that I ran into is when I calibrate using the solution my tanks...

Brs refractometer with LED light. Comes with calibration solution. Ships with paypal.

Refractometer with LED light and calibration solution $25. Ships with paypal.

Hanna Checkers for Sale. Calcium - $20 Alkalinity - $20 Phosphorus ULR - $25 Nitrate HR - $30 Nitrate HR HI728-25 reagents x2 -$10 Each Nitrate LR - $25 Refractometer RHS-10ATC - $15 GHL doser 2.0 Master 3Pump 1 white body (pictured) 1 Black body - $225 each Shipped Box, power supply, USB...

Does copper artificially elevate salinity readings on refractometers? I am at 0.25 copper today, and did a water change before starting to ramp up. The bucket of water I mixed said 35ppt, and I just went to test the salinity of the QT tank and it was at 43. I'm adding fresh RODI water to bring...

I was wondering if there was any Salinity testing equipment that actively reads Salinity in real-time, I use the Hanna Salinity Checker which I really enjoy but sometimes I get the feeling that it's not as accurate as a Refractometer.

I already own a delicate, glass hydrometer from Dupla. Plan on buying a digital refractometer, the Hanna one specifically. Should I own a handheld refractometer to double check the digital refractometer? The Vee Gee STX-3 is a bit of an investment, but I can't doublecheck with the hydrometer...

Good afternoon, Using tropic Marin pro reef mix (German); I have ~25 gallons and added 12 1/2 cups of salt and ended up with 1.010 on my refractometer after 36 hours (heater at 77 and power head in the brute container too) which idk why feels odd. The furniture I was planning to put the tank on...

How accurate is the veegee stx-3? I just purchased one for 115$ shipped and was wondering if a made the wrong choice? I read on a forum on here for a good refractometer, and the Vee Gee cam up more than any other as their go to.

I want to get into the habit of checking my salinity more often. The issue is using a salinity measuring tool that I can trust, and rely on without having to tinker with it every time. An analog refractometer requires quite a bit of tinkering and cleaning for one measurement. The Hanna Salinity...

So I just picked up more salt and RO/DI water at my LFS. I checked the salinity with my refractometer and it said it was 1.030, they told me it was 1.025. They used a very expensive salinity checker so I’m assuming there’s is more accurate then mine, so the problem is the salinity of my tank...

Like new digital Refractometer, comes with original box and RODI/sea water standard samples for calibration. Works flawlessly just no longer need it as I’m no longer in the hobby. Asking $105 shipped.

ok so i bought a refractometer because i wanna get pinpoint accuracy of my tanks salinity and i have a few questions. ok so first of it’s a fairly old refractometer it looks to be sitting on that shelf for a while will that affect how it works i opened it up and it looks brand new though. also...

In good working order. Used for about 2 years. $70 shipped. !

Situation up front, do to my poor selection in refractometers my 90 gal LPS dominate tank is currently sitting at 1.017 and I need to know how much and how quickly I should raise the salinity. I notice that about 2 weeks ago that my hammer wasn’t extending as much as he had been so I started...

Hello Everyone! So a week ago I realized my ATC refractometer was calibrated wrong by about .003. No big whoop, instead of being at 1.025 my tank was at 1.021 where it was running stable. I did a PWC of about 30%, brought the water up to 1.022 and figured I would just do some manual saltwater...

SOLD !!! ATC Refractometer including the calibration tool and a microfiber cloth behind the inside cover. The case latch is broken. Only use about two times. I accept PayPal. Thanks

$160 SHIPPED

I bought this Milwaukee Refractometer and haven't used it much. I used it when I first got it then bought a hand held one from BRS. I am selling the refractometer with case for $100.00 with shipping included. It sells for $110 on Amazon and the case is $25 on Amazon. Sorry if images are...

I know...I have a problem. I was organizing my supply cabinet and realized I have clearly accumulated more test kits than should ever be necessary. BUT it has been helpful having everything I need at arms reach, and the ease of use of these kits has caused me to test consistently, which I’m...

My new refractometer from BRS came in, so I calibrated it and checked my S.G. OMG!!! I thought I had things under control because I have a friend with a refractometer which I checked against my hydrometer. It showed that my Hmeter was off a bit so I was able to compensate for it based on his...

We are taking pre-orders for the new tester. It features graphite sensors for in tank use and better reliability. We expect orders to begin shipping next week. https://www.aquariumspecialty.com/hanna-instruments-hi98319-marine-salinity-tester.html

Learn more about the new Hanna Instruments salinity tester by visiting the AquaNerd blog. The new tester features graphite sensors for long lasting accuracy. https://aquanerd.com/2018/12/the-new-hi98319-marine-salinity-tester-from-hanna-instruments.html

So, I got tired of looking at my record high salinity readings on apex (due to error in calibration) and decided to get it properly calibrated and put it in use... I purchased a pinpoint calibration solution and waited eagerly for it to arrive. I have "hopefully" calibrated the probe the right...