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Aquanswers

  • About / Contact
  • Freshwater Aquarium
    • Betta Fish
    • Fish Ideas
      • Best for Beginners
      • Species For a Small 5-Gallon Tank
      • Smallest Species
      • Most Colorful Species
      • Easiest Species To Take Care of
      • Community Species
      • Cold Water Species
      • Species That Eat Snails
      • Pet Eels
      • Hair Algae Eaters
      • Pet Sharks
      • Coolest Species
    • Fish Keeping Guides
  • Saltwater Aquarium
    • Ideas for Fish
      • Reef Safe Species
      • Algae Eaters
      • Small & Nano Species
  • Fish Diseases
    • White Spots
    • Treating Freshwater Ich
    • Treating Saltwater Ich
    • Nitrate Poisoning
    • Swimming Upside-Down
  • Water Care
    • Aquarium Bacteria Starter
    • Nitrate in Freshwater Aquarium
    • Nitrate in Saltwater Aquarium
    • Nitrite
    • Cloudy Water
    • Green Water
  • Gear Help
    • LED Aquarium Lighting
      • For Coral Growth
      • For Plant Growth
      • For a Refugium
    • Aquarium Heater
      • Small
    • Aquarium Filter
      • Canister
      • For Turtle Tank
      • The Quietest
      • Floss
    • Aquarium Tank
      • For a Betta Fish
    • Aquarium UV Sterilizer
    • Aquarium RO DI System
    • Aquarium Powerhead
    • Aquarium CO2 Regulator
    • Aquarium Plant Fertilizer
    • Substrate for Planted Tanks
  • Aquascaping
  • Aquarium Dimensions
  • About / Contact
  • Freshwater Aquarium
    • Betta Fish
    • Fish Ideas
      • Best for Beginners
      • Species For a Small 5-Gallon Tank
      • Smallest Species
      • Most Colorful Species
      • Easiest Species To Take Care of
      • Community Species
      • Cold Water Species
      • Species That Eat Snails
      • Pet Eels
      • Hair Algae Eaters
      • Pet Sharks
      • Coolest Species
    • Fish Keeping Guides
  • Saltwater Aquarium
    • Ideas for Fish
      • Reef Safe Species
      • Algae Eaters
      • Small & Nano Species
  • Fish Diseases
    • White Spots
    • Treating Freshwater Ich
    • Treating Saltwater Ich
    • Nitrate Poisoning
    • Swimming Upside-Down
  • Water Care
    • Aquarium Bacteria Starter
    • Nitrate in Freshwater Aquarium
    • Nitrate in Saltwater Aquarium
    • Nitrite
    • Cloudy Water
    • Green Water
  • Gear Help
    • LED Aquarium Lighting
      • For Coral Growth
      • For Plant Growth
      • For a Refugium
    • Aquarium Heater
      • Small
    • Aquarium Filter
      • Canister
      • For Turtle Tank
      • The Quietest
      • Floss
    • Aquarium Tank
      • For a Betta Fish
    • Aquarium UV Sterilizer
    • Aquarium RO DI System
    • Aquarium Powerhead
    • Aquarium CO2 Regulator
    • Aquarium Plant Fertilizer
    • Substrate for Planted Tanks
  • Aquascaping
  • Aquarium Dimensions

Saltwater Aquarium

This resource page contains a collection of in-depth articles about topics concerning saltwater and reef aquariums in general.

I also have a page specifically for saltwater fish ideas where you can check out different types of fish and some good combinations for your new tank.

Browsing through this section is recommended for both beginner and advanced aquarists.

Learn how to set up or improve your marine tank at home:

15 Largest Public Aquariums in The World (2+ Million Gallons)

April 18, 2023 by Momchil

If you’ve personally seen a 300-gallon fish tank up close you know how tiny it makes you feel.

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The ONLY Reef-Safe Ich Treatment in a Display Tank

September 12, 2023 by Momchil

Reef safe ich treatment header

It’s really discouraging to see your aquarium efforts go to waste because of a single parasitic outbreak.

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The 5 Best Aquarium Bacteria Supplements & Starters

September 8, 2023 by Momchil

The main aim when cycling your new fish tank is to make sure the aquarium is habitable.

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6 Tested Saltwater Ich Treatments to Save Your Marine Fish

September 8, 2023 by Momchil

Saltwater ich treatment header

Did you recently add the perfect fish to your aquarium, just to find it covered in white dots a couple of days later?

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8 Best RO DI Systems For a Reef Tank (Pristine Water)

September 8, 2023 by Momchil

best ro di system for reef tank header
Having the saline water in your saltwater aquarium unpolluted is so important because it supports virtually all creatures in it.

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Identifying the White Spots That Appear on Fish (illustrated)

September 8, 2023 by Momchil

white spots on fish header

One day you pass by your aquarium and notice that your goldfish or Betta is covered in something unusual.

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What Nitrate Levels Are Acceptable in a Saltwater Aquarium?

September 8, 2023 by Momchil

nitrate levels in saltwater aquarium header

Knowing what to do when pollutants build up in your fish tank is key to maintaining healthy water quality for your aquatic pets.

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Nitrate Poisoning in Aquarium Fish: Causes and Cures

September 8, 2023 by Momchil

If you notice that your pet goldfish is grotesquely curled up then it’s definitely time to reassess the water quality in your aquarium.

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5 Best Powerheads for a Natural Flow in a Reef Tank

September 8, 2023 by Momchil

In a reef tank, the flow of water is essential for the corals and fish that are used to waves and currents in the oceans.

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Best LED Refugium Lights to Grow Massive Chaetomorpha

September 8, 2023 by Momchil

best led refugium light header
As far as natural solutions for saltwater fish tanks go, there’s not much that is cooler than refugiums as a form of aquarium filtration.

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The Best Coral Foods for Rapid Reef Tank Growth

September 8, 2023 by Momchil

best coral food header
Saltwater reef aquariums are the epitome of the hobby.

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Best LED Aquarium Lighting for Reef Tank Corals (2023)

September 8, 2023 by Momchil

best led aquarium lighting for corals header
Looking after a reef tank at home requires dedication, profound knowledge, and having the right equipment.

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Best LED Aquarium Lighting Units for Your Gallon Tank Capacity

September 8, 2023 by Momchil

best led aquarium lighting header

*I wasn’t skilled enough to draw a LED so I drew a bulb instead. Meh.

After their emergence, LED lights have dominated the market in the fishkeeping hobby, and there’s a reason for that.

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Best GFO and Carbon Media Reactors for a Stable Reef Tank

September 8, 2023 by Momchil


When it comes to saltwater aquarium filtration, at times you need more than the regular protein skimmer to get rid of all the pollutants.

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Cloudy Aquarium Water: Why it Happens and How to Clear it?

September 8, 2023 by Momchil

cloudy aquarium water header
So you’ve just set up your new fish tank and, at first, it had perfect crystal clear water.

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How to get rid of green aquarium water (algae bloom)?

July 25, 2023 by Momchil

how to get rid of green water in aquarium header
You’ve got your new aquarium started and it’s been going great; your fish seem happy, active and everything seems like smooth sailing from here on out.

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20 Hair Algae Eaters for a SPOTLESS Aquarium

August 30, 2023 by Momchil

aquarium algae eaters header
Algae come in many varieties and forms and more often than not it’s an uninvited intruder rather than a beautiful aquascape addition.

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How to Lower Nitrite Levels in a Freshwater & Saltwater Aquarium on Time?

September 8, 2023 by Momchil


Nitrite can cause significant damage to aquatic inhabitants or even kill them.

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Cause (+ Cures) for a Fish That’s Floating Upside-Down But is Still Alive?

September 8, 2023 by Momchil

fish floating upside down but still alive header

One day you wake up to the stunning sight of your favorite goldfish acting like a balloon.

A fish floating at top of the tank but not dead yet (even actively moving around) can be confusing to witness. What does that signal?

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The Honest Truth About Black Diamond Blasting Sand Safety in Aquarium

March 20, 2023 by Momchil

black diamond blasting sand aquarium header

That black sandblasting sand will look amazing under your aquatic plants, right?

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Tips for Buying the Best 125-Gallon Aquarium Light

September 8, 2023 by Momchil

125 gallon aquarium light header

Having a 125-gallon fish tank is presumably the next level of fishkeeping and, boy, can it be rewarding.

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How Long Does it Take for Free Chlorine to Evaporate From Tap Water Entirely?

September 8, 2023 by Momchil

how long does it take for chlorine to ecaporate from tap water header

Surely many aquarists have heard that chlorine will leave faucet water after some time.

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Essentials When Looking After a Hammerhead Coral (+Tips)

April 18, 2023 by Momchil

hammerhead coral placement header

I wish someone had told me how to handle my first hammerhead and save me all the time I spent researching it.

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Mystery SOLVED – Is Distilled Water Particularly Good for Fish Tanks?

March 10, 2023 by Momchil

is distilled water good for fish tanks header

The best water for aquarium use should be clean and contain as little contaminants as possible, right?

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Do They Work – API Quick Start VS Tetra SafeStart?

August 29, 2023 by Momchil

api quick start vs tetra safestart header

There’s an ongoing debate among fishkeepers about whether Tetra’s SafeStart and API’s Quick Start even work.

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ABOUT MOMCHIL & AQUANSWERS

Momchil has had his fair share of aquarium care. He has made MANY mistakes throughout his fishkeeping journey and thus learned A LOT. In Aquanswers, Momchil shares knowledge about freshwater and saltwater home aquariums with the people from his community.

Latest Articles

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