1-800-566-3474

Marine Depot Aquarium Pro Refractometer

In Stock: Order by 2PM EST for same-day shipping (M-F)

This item is in stock in our East and West Coast warehouses

$49.99  


MD2103

Add to Wishlist

SHIPS FREE!

Marine Depot

Designed specifically for aquarium use to measure the salinity of natural sea water (NSW). Most handheld saltwater refractometers available in the hobby are designed and calibrated for testing brine solution, i.e. sodium chloride, and are not calibrated for the refractive index of natural sea water. This is a very important distinction: other salinity refractometers used for marine aquariums are designed to test saltwater and nothing else! The Marine Depot Aquarium Pro Refractometer is designed to measure the salinity of NSW taking into account all the other elements that comprise salinity in the marine water sample.

Even though the largest percentage of salt in the sea is sodium chloride, the presence of other significant ions such as magnesium and calcium in NSW results in a different refractive index to that of brine. A standard (brine) refractometer will therefore not give the correct salinity for NSW and a conversion factor must be applied.

For example, a 35 ppt (parts per thousand) solution of NSW has the same refractive index as a 36.5 ppt solution of brine. When using a brine refractometer, an aquarium hobbyist should therefore look for a reading of 36.5 ppt when trying to achieve a reading of 35 ppt for NSW.

Easier to Read

One of the other problems with most refractometers is the scale displayed normally reads from 0-100 ppt when we are really only interested in the region from 30-40 ppt. The Marine Depot Aquarium Pro Refractometer has therefore been specifically designed to read from 1.015-1.030 which gives you much better resolution of a normal 1.000-1.070 scale.

  • Marine Depot Aquarium Pro Refractometer
  • Protective Hardshell Case
  • Pipette
  • Soft Cloth
  • Calibration Screw Driver



Manufacturer Info

MarineDepot.com carries more than 7,500 popular and hard-to-find aquarium supplies and fish tank accessories for saltwater and freshwater aquariums. You’ll find the top aquarium equipment and aquarium accessories from Hagen, Red Sea, Eheim, Coralife and many more. All of our aquarium pet supplies carry a 60-day money-back guarantee and we offer a Low Price Guarantee on all in-stock aquarium products. We ship 99.9% of fish tank supplies the same business day if you place your order before 6 PM EST. If you have any questions about fish supplies please do not hesitate to contact us. We’re here to help!


Warranty

12 Month manufacturer warranty.

Accessories for Marine Depot Aquarium Pro Refractometer


Similar Items

Ask a Question Earn 25 Points when you ask a question
Sort By :
 
9 Questions
Displaying questions 1-9
 
 
Write Your Review Earn 25 Points when you write a review
Sort by:
 

Overall, others give this:

40 Reviewers (0%) would recommend this

Overall Rating:

5.0  Star
 28
4.5  Star
 1
4.0  Star
 7
3.5  Star
 0
3.0  Star
 1
2.5  Star
 0
2.0  Star
 1
1.5  Star
 1
1.0  Star
 1
0.5  Star
 0
 
“Accurate”
5.0

Great device at a reasonable price. came calibrated, works great all reefers should have one.

Was this review helpful: Yes(0)No(0)
 
 
“A must have!”
5.0

This is a must have tool for any marine aquarium. I love this thing! Easy to use and accurate. Thanks marine depot!

Was this review helpful: Yes(0)No(0)
 
 
“Good Tool”
5.0

Easy to use tool for measuring water saltwater gravity levels!!

Was this review helpful: Yes(0)No(0)
 
 
“Works as advertised”
5.0

Works just fine. It would be nice if the case were longer so that the refractor can be stored while extended (focused).

Was this review helpful: Yes(0)No(0)
 
 
“good”
4.0

The refractometer works well with a single caveat. I would have preferred the scales to go all the way down to zero. Otherwise no complaints.

Was this review helpful: Yes(0)No(0)
 
 
“Great Product!”
5.0

I am very impressed with this product. It is well made and, above all, very accurate. I made the mistake of solely using an inexpensive hydrometer, which over time became inaccurate. Because of this my salinity dropped to very low levels and before I found the problem I had lost a few corals and ...Read More

Was this review helpful: Yes(1)No(0)
 
 
“Refractometer”
5.0

The Marine Depot refractometer is much lighter than the model I am accustomed to which gave me the impression it may not be as sturdy as my previous model. However, the Marine Depot refractometer is more accurate. I have no idea why it is noticeably lighter but I would recommend it strictly due to i...Read More

Was this review helpful: Yes(2)No(0)
 
 
Write Your Review Earn 25 Points when you write a review
Sort by:
 

Overall, others give this:

40 Reviewers (0%) would recommend this

Overall Rating:

5.0  Star
 28
4.5  Star
 1
4.0  Star
 7
3.5  Star
 0
3.0  Star
 1
2.5  Star
 0
2.0  Star
 1
1.5  Star
 1
1.0  Star
 1
0.5  Star
 0