Sea Lettuce grows in ribbons

Using Ulva to Remove Excess Nutrients

Sea lettuce (Ulva lactuca) is an extremely versatile refugium macroalgae. It’s big, verdant fronds can add a little “greenery” to a reefscape. Highly palatable and nutritious, it serves as an excellent live food for larger herbivorous fish and invertebrates. Its broad “leaves” can grow in dense clumps, providing an enormous amount of microhabitat for small, …

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The new Kessil refugium lighting!

Advanced Refugium Lighting

Planted refugia are used to cultivate macroalgae. And that’s about the only thing that has stayed the same over the years. As time goes on and the saltwater aquarium hobby becomes more and more sophisticated, these set-ups are becoming increasingly complicated, specialized, and technologically advanced. They are designated for many different types of uses (nutrient …

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Blue Hypnea: The Next Hot Refugium Macro?

Though it sells out quickly when available, blue hypnea is out there for the grabs. And it’s well worth it for those that cater to its needs! This gorgeous plant can really spice up a refugium; it can also be displayed in the main tank (assuming no large herbivores are present) because it cannot overgrow …

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4 Macroalgae for Beginners

Macroalgae are a great addition to any aquarium. They remove excess nutrients in the water column (such as phosphates and nitrates) and provide shelter for copepods which helps with successfully breeding them in your tank. There are many different types of macroalgae; in this article I will be discussing the best types for beginners. Macroalga …

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AlgaeBarn Pom Pom Macroalgae

Pom Pom Macro as a Replacement for Chaeto?

It appears that the chaeto macroalgae (Chaetomorpha spp.) has become what Caulerpa was around the turn of the millennium: The predominate go-to refugium macro. And it really can be great for this purpose. That being said, it has (like Caulerpa) its own set of advantages and disadvantages. In reviewing both the pros and cons of …

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Types of Aquarium Lighting

Aquarium lighting has come a long way. There are now many, many different types to choose from. For sure, different lighting systems have different capabilities. The one that is best for you all depends on what you plan on keeping in your tank.  If you don’t plan on keeping any photosynthetic organisms (corals, tridacnid clams, …

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A brown Macroalgae

Mixed Macros in the Planted Refugium

There are plenty of reasons to install a planted refugium into your reef aquarium system. You might culture macroalgae for numerous purposes including removing excess nutrients, growing a live food for herbivores, creating pod microhabitat, or just for simple enjoyment. Some macros are better suited for some of these purposes than for others. Therefore, if …

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A Refugium without substrate.

Getting to the Bottom of Refugium Substrates

These days, it seems as though a pretty solid majority of reef aquarium systems include a refugium. The growing popularity of refugia has been more a glorious resurgence than a successively rising trend. Indeed, they were quite commonly used in the hobby in the early 1990s. Unlike the refugia we’ve been seeing today, however, the …

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Red Macroalgae for the Moderately Illuminated Refugium

While there are many species of green, brown and red macroalgae (i.e. multicellular algae) in nature, it is the greens and reds that are most commonly used in planted refugia. Each species is attractive for its own unique set of positive characteristics. Still, one could draw generalizations about each of these latter two big groups: …

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Ocean Rock is often Coral Skeletons

How to Fully Condition Your Dry Reef Rock

We’re all subject to impatience. Particularly when we’re anticipating a highly gratifying event, such as adding the first round of corals to a newly set up reef aquarium. Thankfully, using dry rock, it only takes a few extra days to help ensure a clean and pest-free system from the start. There’s even an added bonus: …

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Pod vs Sock: Do Mechanical Filters Kill Copepods?

Considering that aquarium keeping is a mere nerdy pastime, it can be surprising that there are so many contentious issues amongst hobbyists. One such big “controversy” centers around the impact of mechanical filtration (especially filter socks) on zooplankton (especially copepods). Naturally, as one of the world’s largest commercial producers of copepods, we have a couple …

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Marinepure Ceramic Biomedia

Using MarinePure in the Aquarium, Sump and Refugium

Managing dissolved nutrients–especially ammonia, nitrite and nitrate–is among the major tasks of reef aquarium husbandry. Accomplishing this can be easy or difficult, cheap or expensive, depending upon how you go about it. And there are lots of ways an aquarist can go about this job. This ranges from operating planted refugia to performing massive regular …

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Coralline Algae Encrusted Rcok

What are Coralline Algae?

There are all sorts of bad algae–hair, slime, turf–and they are widely recognized by aquarists as a manifest sign of poor water quality. On the other hand, a healthy growth of calcareous algae is regarded as desirable. Calcareous forms are slow-growing yet they compete for space with (and thereby suppress) all the ugly bad forms. …

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Limpets are incredible aquarium cleaners

Eliminating Algae with Siphonaria Limpets

In case you haven’t noticed, marine aquarium hobbyists have really upped their standards lately with respect to algal fouling. These much cleaner, healthier, natural-looking tanks surely are the fruit of numerous advancements in water filtration/treatment techniques. But we’ve slipped a few other cards under our sleeves, too; we’ve added an important new component to the …

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No, not this kind of cryptic zone!

Cryptic Zones in the Refugium

What are Cryptic Zones, Anyway? The planted refugium and its associated cryptic zones have gained a lot of traction among reef aquarists in recent years. This has largely been the result of a growing awareness of the need to control excess dissolved nutrients (e.g. nitrate and phosphate). As hobbyists experiment with specifics like macroalgae species …

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Red Gracilaria loves good refugium lighting!

A Look at the Pom Pom Macroalgae

Of all the genera of macroalgae regularly used in planted refugia, Gracilaria quite arguably has the most representatives. While there are a few very soft and feathery varieties (most of which belong to the “ogos”), there are some Gracilaria spp. that are rather stiff and leafy. Perhaps the most popular of these fat-fronded varieties is …

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A Refugium of sorts, this algae bed helps clean the oceans!

Building Your Refugium Clean-Up Crew

No one ever said that keeping reef aquaria is totally uncomplicated. Especially keeping them clean! Sure, some maintenance approaches are simpler than others; natural methods are, for example, fairly effortless means to control nuisance algae, detritus and pests. Natural methods certainly require some research, planning and occasional monitoring; but for the most part, they involve …

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