Great Aquariums Start Here
1-800-566-3474
    Free Shipping On $175+
  • FREE Shipping On $175+
  • 14-Day Low Price Guarantee
  • 14-Day Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
FREE Shipping on Orders Over $175
FREE Shipping on
Orders Over $175
Standard ground shipping (1-7 business days) starts at a low $5.99 and most orders over $175 ship FREE. Learn More
14-Day Low Price Guarantee
If you find a product we sell for a lower price at another online store, we will match their price—today and up to 14 days after you've purchased the item! Learn More
Same Day Shipping
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 6 pm EST ship the same day! Learn More
Show: per page
Grid View Grid List View List
Sort by:
76 - 100 of 116
Continuum Aquatics Coralline Purple-CX Coralline Algae Growth Accelerator

Continuum Aquatics Coralline Purple-CX Coralline Algae Growth Accelerator

Coralline Purple•CX Description: Coralline Algae Accelerator for Marine Aquariums Features: • Specifically designed to encourage and accelerate coralline algae • Contains suspended aragonite • Does not promote green...

From $6.99
Continuum Aquatics Bacter Gen-MD Marine Microbe Culture for Denitration

Continuum Aquatics Bacter Gen-MD Marine Microbe Culture for Denitration

BacterGen•MD Description: Microbial Culture for Denitrators and Denitration in Marine Aquariums Features: • Establishes anaerobic bacteria in denitrators and marine systems • Establishes anoxic zones to accelerate gr...

From $7.99
Salifert Iodine

Salifert Iodine

Why is iodine required? Corals might require iodine as a de-toxifier, as a protection against uv-radiation and as a natural defense against many parasites. Iodine is present in NSW (Natural Sea Water) in a very low concentratio...

From $12.99
Brightwell Aquatics AminOmega

Brightwell Aquatics AminOmega

Overview Provides marine sources of amino acids and omega-3 and -6 highly unsaturated fatty acids (HUFA). Increases the nutritional value of foods for marine fishes and invertebrates, particularly for fishes that show signs ...

From $7.49
Brightwell Aquatics Potassion-P Dry Potassium Supplement for Reef Aquaria 300g / 10.5oz

Brightwell Aquatics Potassion-P Dry Potassium Supplement for Reef Aquaria 300g / 10.5oz

• Blend of high-purity powdered potassium, an important component of aragonite (the mineral secreted as skeletal material by corals and other reef-building marine organisms), complexed into pigments tha...

$10.99
Salifert Magnesium

Salifert Magnesium

Why is Magnesium required? Magnesium is present in NSW (Natural Sea Water) in a fairly high concentration (1350 – 1500 mg/L). Magnesium is an essential part of chlorophyll, which is necessary for photosynthesis. Without photosyn...

From $12.99
Boyd Vitachem 4oz - Freshwater

Boyd Vitachem 4oz - Freshwater

Boyd Vita-Chem Fresh A complete vitamin supplement with natural lipids and aminos. It`s great for fin regeneration & preventing lateral line disease. Highest amount of active vitamin C available. 4oz. Vita-chem for fresh w...

$10.99
Caribsea AragaMilk Liquid Aragonite Calcium Supplement

Caribsea AragaMilk Liquid Aragonite Calcium Supplement

AragaMILK™ Ideal for African cichlids, livebearers, and marine aquariums of all types! The perfect alkalinity booster because...aragaMILK™ has a full pound of buffer in every 16 fluid ounce bottle. This buffer comes in two form...

From $11.99
Continuum Aquatics Reef-Basis Lugols EX Iodine Supplement - 30 ml

Continuum Aquatics Reef-Basis Lugols EX Iodine Supplement - 30 ml

Reef•Basis Lugol’s EX Iodine Supplement Description: Iodine Supplement for Marine Aquariums Features: • Powerful Iodine supplement for use by experts only! • Nourishes live hard and soft corals • Allows corals to shield...

$11.49
Salifert KH & pH Buffer

Salifert KH & pH Buffer

About KH + pH Buffer It is a highly concentrated, fast dissolving powder which increases alkalinity (carbonate hardness) and stabilizes the pH at the correct value. In these ways it contributes significantly to the health of all...

From $10.99
Continuum Aquatics Reef Micro-Fuel Bacteria & Bacterioplankton Accelerator

Continuum Aquatics Reef Micro-Fuel Bacteria & Bacterioplankton Accelerator

Reef Micro•Fuel Description: Fuel for Bacteria Growth Features: • Safe organic carbon source for accelerated bacteria growth • Technologically advanced, sugar and alcohol free • Contains no gluconates or polygluconates ...

From $7.99
Caribsea BioMagnet Clarifier 16 oz

Caribsea BioMagnet Clarifier 16 oz

Caribsea BioMagnet Clarifier Bio-Magnet™ Cloudy aquarium water is caused by fine suspended particles such as algae, silt, and bacteria. These particles usually carry a negative charge as does most filter media. The filter media...

$14.49
Continuum Aquatics Reef-Basis Magnesium Dry Form

Continuum Aquatics Reef-Basis Magnesium Dry Form

Reef•Basis Magnesium Description: Dry Magnesium Supplement for Marine Aquariums Features: • Provides bioavailable magnesium for corals and other invertebrates • Helps maintain pH and KH control in marine aquariums ...

From $8.49
Brightwell Aquatics Elemental - Dry Reef-Building Complex for Corals, Clams, etc.

Brightwell Aquatics Elemental - Dry Reef-Building Complex for Corals, Clams, etc.

Overview Contains calcium, strontium, and magnesium in the same ionic ratios found in aragonite. This unique feature increases the usefulness of Kalk+2 to reef-building invertebrates such as corals, clams, calcareous algae, e...

From $13.49
Salifert Trace Hard

Salifert Trace Hard

The importance of trace elements By trace elements we usually mean elements that are present in natural seawater in a concentration lower than approx. 1 mg/L or ppm. Some of these elements are essential to make many biological p...

From $12.99
Ruby Reef Sliminator - 16 oz.

Ruby Reef Sliminator - 16 oz.

What is SLIMINATOR™? SLIMINATOR™ is a safe and effective water treatment for the control of cyanobacteria (a.k.a. “slime algae”) in marine and freshwater aquaria. One of the most important features of SLIMINATOR™ is that it do...

$11.99
Continuum Aquatics Reef-Sculpture Part B Liquid Calcium & Alkalinity Supplement

Continuum Aquatics Reef-Sculpture Part B Liquid Calcium & Alkalinity Supplement

Reef•Sculpture Part B Description: Part B of Two Part Calcium & Alkalinity System Features: • Part B of Two part calcium buffer system for marine reef aquariums • Ionically balanced calcium & alkalinity control syste...

From $4.99
Continuum Aquatics Reef-Sculpture Part A Liquid Calcium & Alkalinity Supplement

Continuum Aquatics Reef-Sculpture Part A Liquid Calcium & Alkalinity Supplement

Reef•Sculpture Part A Description: Part A of Two Part Calcium & Alkalinity System Features: • Part A of Two part calcium buffer system for marine reef aquariums • Ionically balanced calcium & alkalinity control syste...

From $4.99
Salifert Trace Soft

Salifert Trace Soft

The importance of trace elements By trace elements we usually mean elements that are present in natural seawater in a concentration lower than approx. 1 mg/L or ppm. Some of these elements are essential to make many biological p...

From $11.99
E.S.V. Strontium Chloride Solution 16 oz.

E.S.V. Strontium Chloride Solution 16 oz.

Strontium Chloride Solution is a very pure and concentrated form of strontium, free of phosphates and nitrates. The aquarist should be aware that Strontium Chloride does not add bicarbonate and carbonate ions to the system. Since ...

$10.99
Continuum Aquatics Reef-Basis Potassium Concentrated Liquid Supplement

Continuum Aquatics Reef-Basis Potassium Concentrated Liquid Supplement

Reef•Basis Potassium Description: Potassium Supplement for Marine Aquariums Features: • Provides bioavailable potassium for corals and other invertebrates • Contains no acetates, gluconates, or polygluconates Adva...

From $6.49
Kent Marine Liquid Reactor

Kent Marine Liquid Reactor

Description: Liquid Reactor is a complete calcium buffer system designed to give the same results as costly calcium reactor systems without investing in a reactor, CO2 tank, solenoid, and pH controller; also, there is no risk of...

From $13.49
Continuum Aquatics Bio-Viv M Superior Multi-Vitamins for Marine Fishes

Continuum Aquatics Bio-Viv M Superior Multi-Vitamins for Marine Fishes

Bio•Viv-M Marine Description: Multivitamin Complex for Marine Fishes Features: • Superior multivitamin complex for all marine fishes & corals • Provides essential vitamins and micronutrients • Rich in chlorophyll, an...

From $7.49
Continuum Aquatics Marine Elements-T Mineral Complex

Continuum Aquatics Marine Elements-T Mineral Complex

Marine Elements•T Description: Premium Minor & Trace Mineral Supplement for Marine Aquariums & Reefs Features: • Provides bioavailable minerals for fish and invertebrates • Phosphate, Nitrate & Silicate Free •...

From $2.69
Continuum Aquatics Reef-Basis Potassium Dry Form

Continuum Aquatics Reef-Basis Potassium Dry Form

Reef•Basis Potassium Description: Dry Potassium Supplement for Marine Aquariums Features: • Provides bioavailable potassium for corals and other invertebrates • Phosphate, Nitrate & Silicate Free • Contains no ace...

From $8.39
76 - 100 of 116
This item is temporarily unavailable but will be back in stock soon.

Item #
Price:
Click the Add To Cart button below if you'd like to reserve this item today. Any other items included in your order will be immediately processed and shipped. We will ship this item separately as soon as it arrives. We will not charge you for this item until it ships and you will incur no additional shipping charges.

Enter your email address in the field below and click the Notify Me button if you'd like us to send you an email when this item becomes available. Although you will be immediately notified when we have stock on hand, we will not reserve any units for you; you must return to our website and place an order.

Your Email:
Just enter your email address below and we'll let you
know when the product you are looking for becomes available!

Item Code:
Price:
Your Email:
Marine Depot Newsletter Signup
Aquariums, News & Culture
Join 100,000+ readers who receive weekly tips, videos, deals and giveaways.