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50 Gallons or Less & Complete Kits

Hydrometers/Refractometers

A good quality hydrometer is important to main optimal salinity. There is a wide range of choices for salinity. Many prefer a low salinity for fish only systems, around 1.018. If you plan on having liverock, corals, snails, shrimps, etc. It would be best to keep your salinity a little higher. The corals generally prefer 1.025, but you can compromise and run anything from 1.020 to 1.025. The most important thing is to keep consistent. You do not necessary have to get the most expensive tester on the market, even the low priced little SeaTest models will work. We would recommend having it compared to a Refractometer at your local pet shop so you can verify the results.

Displaying products 1 - 6 of 6 results
Instant Ocean Hydrometer
Your Price: $8.03
Instant Ocean Hydrometer
Coral Life Deep Six Hydrometers
Your Price: $8.03
Coral Life Deep Six Hydrometers
Coral Life Deep Six Hydrometers
Red Sea Hydrometer with Thermometer
List Price: $12.99
Your Price: $10.03
You Save: $2.96 (23 %)
Red Sea Hydrometer with Thermometer
Red Sea Hydrometer-Thermometer
Ammonite Hydrometer by Aquatic Life
Your Price: $8.02
Ammonite Hydrometer by Aquatic Life
By AquaticLife
JBJ C-Scope Salinity Refractometer
List Price: $69.99
Your Price: $55.16
You Save: $14.83 (21 %)
JBJ C-Scope Salinity Refractometer
H2Ocean Refractometer
List Price: $98.99
Your Price: $74.99
You Save: $24.00 (24 %)
H2Ocean Refractometer
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Our mission 

Fish Tanks Direct Specializes in Acrylic Aquariums delivered right from the factory floor. Save thousands of dollars off of your next custom acrylic aquarium by shopping with us. We have been in the Fish Tanks industry for over 20 years and we have knowledgeable staff that will be happy to pick out the perfect acrylic aquarium for your home. Don't forget to shop by shape! We have a wide assortment of shapes that you can choose from which come in many of the popular sizes. Our customized fish tanks do not come with stand or canopy so you will have to order them separately. Many of the wood stains are minwax colors so check your local hardware store to see the actual color as the web can distort the actual color.

We also carry a full line of filters for your aquarium. We can perfectly match your aquarium up with a powerful protein skimmer and or canister filter. It is critical that you have proper filtration when purchasing your acrylic fish tank. Advanced hobbyists can take advantage of our low cost aquarium chillers. We have better brands at a lower price than many of our competitors. Need clean water? Passionate about getting rid of parasites? We carry Reverse Osmosis systems, UV sterilizers, and Ozonizers to fit any application. Simply ask one of our helpful staff members to help you out.