Equipment
Coralife Deep Six Hydrometer.
The Coralife Deep Six hydrometer — a classic swing-arm hydrometer for measuring specific gravity in saltwater tanks. Float it in a cup of tank water for a quick salinity reading.
In-store purchase only. There is no online checkout on this site. Pick this up at our Erie store, or call us to arrange shipping.
- Brand
- Coralife
- Condition
- new
- Fulfillment
- Local pickup — Erie, PA
Pick this up at the shop, or ask us to ship it. Shipping cost depends on the item, so call (814) 456-9445 and we'll quote it — payment is taken upfront before the order goes out.
What it's for
Underlined topics open the guide that explains how they work.
- measuring salinity in saltwater aquariumsTesting & monitoring waterReading the numbers in your water, so you fix problems before you can see them.In Aquarium Water Testing: What Your Numbers Actually Mean
- checking specific gravity for marine fish and reef tanksCoral & reef chemistryCorals build their skeleton out of calcium, alkalinity, magnesium and trace elements.In A guide to growing corals: soft, LPS and SPS
- quick salinity reading without a refractometerSaltwater mixing & salinityMixing saltwater to the right strength, and keeping it there as water evaporates.In Your first saltwater aquarium: a FOWLR starter guide
- saltwater aquarium maintenance toolCleaning & water changesWater changes, siphoning and glass cleaning. This is how waste actually leaves a tank.In How to Do an Aquarium Water Change (and How Often)
Set it up right
Guides that use this.
How to Acclimate New Fish: the Float and Drip Methods
Float the sealed bag 15–20 minutes, then add tank water every 5 minutes; drip-acclimate anything sensitive. The full how-to from us at Sea Cave, Erie PA's aquarium shop since 1975.
Read the guide
Aquarium Water Testing: What Your Numbers Actually Mean
Ammonia and nitrite should read zero, nitrate low and steady, pH stable. What every aquarium test number means and how often to check it, explained plain by us at Sea Cave in Erie, PA.
Read the guide
How to quarantine new fish (and treat sick ones): the QT tank
Everyone gets the same advice: quarantine new fish. Then they picture a second tank to scrub and stock, and skip it. The truth is a QT (quarantine tank) is the barest tank you'll ever run, and it's the single best way to keep ich and other diseases out of the display you actually care about.
Read the guide
Visit the store
660 East 14th Street,
Erie, PA.
Mon–Fri 12–6 · Sat 11–4 · Sun closed. Call ahead on livestock — what's on the floor rotates.