Deal of the Week, 12/31/09
AquaticLife Aquarium ControllersRegularly: $199.99 to $259.99
Now Only: $99.99 to $129.99
YOU SAVE 50%!
Learn More...
AquaticLife Aquarium Controllers
Posted by
Jeffry Johnston
@
9:49 AM
Tags: AquaticLife, Controller, Deal of the Week, ORP, pH
We know you smiled when you unwrapped that new sweater/tie/pair of pajamas on Christmas morning. We also know you were faking it.
With the holiday season winding to a close you can put that money from Grandma to good use in our annual After Christmas Sale. Save up to 50% on lighting, bulbs or even splurge on a new Cardiff system from Current USA.
Looking for more deals? We've gotcha covered.
We've got a bunch of coupons (including buy 1 get 1 free offers) that expire at midnight on New Year's Eve (more coupons on different items coming in January!). Lastly, our 15 stocking stuffers under $50 sale is in effect until January 4.
And, of course, if you need assistance—tech support, recommendations—we're always here to help.
E.S.V. B-Ionic Seawater System Salt Mix w/ Measuring Supplies
AquaticLife T5 HO 6-Lamp Light Fixture w/ Lunar LEDs
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PRE-ORDER - 60 Inch 4x80W Sunlight Supply Tek Light High Output Fluorescent Lighting Fixture
PRE-ORDER - 60 Inch 6x80W Sunlight Supply Tek Light High Output Fluorescent Lighting Fixture
PRE-ORDER - 60 Inch 8x80W Sunlight Supply Tek Light High Output Fluorescent Lighting Fixture
PRE-ORDER - 36 Inch 4x39W Sunlight Supply Tek Elite Light High Output Fluorescent Lighting Fixture
PRE-ORDER - 48 Inch 4x54W Sunlight Supply Tek Elite Light High Output Fluorescent Lighting Fixture
PRE-ORDER - 48 Inch 6x54W Sunlight Supply Tek Elite Light High Output Fluorescent Lighting Fixture
PRE-ORDER - 48 Inch 8x54W Sunlight Supply Tek Elite Light High Output Fluorescent Lighting Fixture
IceCap Reef Illuminations 21.6in LED Moonlight 420/460nm T5 Retrofit Tube w/ Power Supply + Mounting Clips
IceCap Reef Illuminations 33.4in LED Moonlight 420/460nm T5 Retrofit Tube w/ Power Supply + Mounting Clips
IceCap Reef Illuminations 45.2in LED Moonlight 420/460nm T5 Retrofit Tube w/ Power Supply + Mounting Clips
UVL 22 Inch T5 V-HO Red Sun Bulb 633NM (24W/40W)
UVL 34 Inch T5 V-HO Red Sun Bulb 633NM (39W/60W)
UVL 46 Inch T5 V-HO Red Sun Bulb 633NM (54W/85W)
Marc Weiss Organics Calcium Vital Plus 16 oz.
Marc Weiss Organics F.O.R.M. Liquid 16 oz.
Marc Weiss Organics Combo Vital 5 oz.
Marc Weiss Organics Garlic Boost Plus 6 oz.
Eshopps S-200 Economy Cone Protein Skimmer
Eshopps S-150 Economy Cone Protein Skimmer
Posted by
Jeffry Johnston
@
9:36 AM
Tags: Additives, Bulb, Coral, Eshopps, Garlic, IceCap, LED, lighting, Marc Weiss, New This Week, Protein Skimmer, Protein Skimmers, Sunlight Supply, UVL

QUESTION
I am starting up a saltwater aquarium once again. It is going to be a reef tank. The aquarium I have now is only a 20 gallons so I was thinking I'd convert it into a refugium and buy a larger tank for fish and plant life. What is the largest aquarium a 20 gallon refugium can feed?
ANSWER
A refugium, as defined in the aquarium hobby, is as an area or refuge where micro-organisms can live and breed without the worry of predation from fish or other organisms. Macro-algaes are also kept in refugiums to aid in waste (nitrate and phosphate) removal from the aquarium’s water. Many people setup refugiums as part of the filtration system for their saltwater aquarium, especially with reef tanks, where nutrient control is a huge concern.
Besides the roll of a micro-organism farm to help feed corals, fish and other invertebrates in your tank, refugiums are a nutrient-control filter and help stabilize the pH of your tank. During the daytime, while the lights are on over your reef tank, the different algae will photosynthesize. The algae will take in CO2 and release 02 while producing sugars to feed themselves. But during the nighttime, they will respire, meaning they take in O2 and release CO2. The CO2 produces carbonic acid which will lower the pH. By running the refugium's light on a reverse daylight period (opposite of the main tank’s light), the algae in the refugium will help balance out the CO2 and O2 production and maintain a more stable pH level.
So what size refugium should you put on your tank?
While there are many different opinions on this, I feel most people will agree a refugium should be at least 10 to 15% of the tank’s volume. So for a 55 gallon tank, for example, a refugium should be at least 5.5 to 8 gallons for it to function properly for that size tank.
But what if you don’t have the space available for something that size? Will a smaller refugium work? “Kind of” is the best answer I can respond with for that question. In my humble opinion, something is better than nothing, but you certainly can’t expect a smaller refugium to perform as well as a larger one.
What to use to light a refugium?
You will need to provide adequate lighting in the proper spectrum to keep macro-algae alive. You can use fluorescent lighting, such as normal output bulbs, power compact, T5 and VHO bulbs or plant grow spot light bulbs. If you really want to light things up, you can even use metal halide lighting. But remember: you don’t need to make the tank look pretty, so stay away from higher Kelvin-rated bulbs. Normally bulbs under 6700K work best to achieve good growth from your algae.
Does flow rate matter through a refugium?
This again is a topic that has a lot of differences in opinions. I personally have setup refugiums with high flow rates and ones with minimal flow rates and, in my opinion, they both work … provided you don’t have a movement so slow things become stagnant in the refugium or movement so fast it literally blows the algae or sand out of the water. Generally speaking, a nice, moderate flow through the refugium will work just fine.
What should you put into your refugium?
Macro-algae should be at the top of your list. There are many different types of algae available that will work well, but most people are leaning toward using Chaetomorpha (or spaghetti algae) over Caulerpa species. The reason for this is two-fold. First, Chaeto (as it is oft-times shortened to) is fairly hardy and grows fast. It grows into a fairly dense formation that is a perfect refuge for micro-organisms like copepods, amphipods and such. The second reason is Chaeto tends to be a “non-invasive” species and can easily be removed for pruning. Caulerpa attaches itself to anything porous and, once established, can be very difficult to remove from the refugium. Also, while I have never actually witnessed this, people claim Caulerpa can go “sexual.” Basically the Caulerpa releases all of its chlorophyll and causes your water to turn green.
Sand is another possible addition to your refugium. Some people like to have a deep sand bed (DSB) located outside of their main display tank. If your refugium is large enough, the use of a DSB within the refugium can also help with nitrate reduction in your water. If you have a small refugium, you can still add an inch or two of sand in there that will give sand dwelling organisms a place to live. There are many different types of worms and other very interesting organisms that will dig through the sand bed searching for food.
Live rock can also be placed in your refugium. The live rock will not only help seed the refugium with micro and macro organisms, it will also give them places to hide as well. A few smaller pieces of what many times is referred to as “live rock rubble” can help kick start a refugium.
Snails, hermit crabs, sea cucumbers and other “non aggressive” invertebrates can also be introduced into a refugium. They can help feed off of some of the nuisance algae or diatoms that may grow as well as any uneaten food that may make its way in there. Hermit crabs are opportunistic scavengers, so you may want to be careful with them. I personally have found the scarlet hermit crabs to be one of the safer hermits out there.
Mangroves are another neat item that can be used in a refugium provided you allow space for its upward growth. Most of the mangrove will actually be out of the water with only its root system fully submerged. While they are not the best at taking up nutrients from the water, they are very neat to watch grow.
What shouldn’t go in your refugium?
Fish is at the top of that list. If you put a fish into your refugium it can, in a matter of days, wipe out the copepods and amphipods you are trying to grow. Do not put fish in there. Certain crabs, such as Arrow Crabs, are well-known for their ability to feed upon bristleworms, so many crabs should be excluded from being allowed in. Sand sifting starfish are another one to mention since these guys can decimate the life of a sand bed very quickly.
Can you make a display refugium, or does it have to be hidden?
You certainly can make your refugium on display for everyone to see, but if you are like me, you will want it to look as good as your main tank. This will create more work for you, but as long as you don’t mind that it can certainly add another topic of conversation when people are viewing your tank.
Overall there are really are no drawbacks to adding a refugium to your tank, whether it is a fish-only (FO) or a reef system, except for maybe the time and cost of setting one up (if you consider that a drawback). They can be very beneficial to the overall health of your tank by not only adding a food source for your fish and corals, but also by providing a very natural filtration to your tank. I have listed a few links with discussions along with a few recommended books if you want to find out more about refugiums and the benefits they can provide for your aquarium.
Macro-algae and refugium discussions

Attention holiday shoppers: tomorrow (12/17) is the last day you can order from us using standard ground shipping (orders $175 & up ship for free!) and be assured your order arrives before Christmas. Below you'll find our entire holiday shipping schedule.
Shipping Method
Last day for ground service (3-5 days): December 17th
Last day for 3-day air service: December 18th
Last day for 2-day air service: December 21st
Last day for overnight air service: December 22nd
Our third annual holiday gift guide is chock-full of great deals from $4.99 bulbs to $189.99 RO/DI systems. If you're looking for stocking stuffers, sign up for our newsletter NOW because we're sending out 15 items under $50 as early as this afternoon.
As usual, we are here to offer free technical support and make personalized product recommendations for your aquarium system. Ring us all the way at 1-800-566-FISH (3474).
Merry Fishmas!
Posted by
Jeffry Johnston
@
12:17 PM
Tags: Holidays, News, Newsletter, Promotions, Shipping
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HM Digital Filter Monitor With Volumizer
QUESTION
How do you prime the filter to get the water to the top of the canister?
ANSWER
Many canister filters will come with a "pump" action primer that allows water to start flowing from the tank down into the canister filter. If your canister filter doesn't have this option there are a few other ways to get this to start.
One way is to fill the canister with water prior to placing it under the tank. Then plug the filter in. If the flow of water doesn't start up, you may pick up the canister filter and turn it slightly on its side (not all the way over, just a little bit). This will allow the water inside the canister to come in contact with the impeller and start the water flowing.
Another way is to use a powerhead (or water pump) to push water down the inlet tube into the canister filter. Once the water starts flowing into the filter (it will start to siphon down) you can plug the filter in and that should get the water flowing for you.
Your best bet is just to contact us directly and tell us what type of filter you're setting up so we can explain precisely what to do.
If you have any additional questions, please do not hesitate to contact us (or leave a comment below).
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If you would like to ask Keith a question, click here.
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NP Biopellets Filter Media
Marco Rocks Key Largo Dry Base
HM Digital Handheld TDS Meter w/ Thermometer
HM Digital Pocket-Sized TDS Meter w/ Thermometer
HM Digital Waterproof pH Meter
Posted by
Jeffry Johnston
@
12:00 PM
Tags: Filter Media, Marco Rock, New This Week, pH, Rock, TDS Meter, Thermometer

Marco Rocks, first mentioned on this blog a couple of weeks ago, are now available for sale on our website.
Marco Rocks promises to be the epitome of "reef safe." Not only are Marco Rocks safe for reef aquariums, they are never ("never ever," their website states) collected from a living reef.
Marco Rocks are natural calcium carbonate and quarried near Key Largo, Florida. The company promises to be a reliable base rock source for marine and reef aquaria.
Each box is hand packed by a reef enthusiast to ensure you get a nice variety for your own tank. Marco Rocks arrive to you pre-cycled to help speed the setup of new aquariums. They are porous, lightweight and have a large surface area.
If you have questions about Marco Rocks or any aquarium product or livestock, don't hesitate to contact us or leave a comment.

Eshopps's über cool frag cave is now officially in-stock. Rejoice, pre-orderers (is that a word?), for your cave will be shipped out today.
For those not already in the know, Eshopps' frag cave is a live rock replica with built-in holes for the included (and matching, mind you) frag plugs.
For $29.99, you'll get the 6" x 4" x 3-1/4" frag cave and 12 matching, removable frag plugs. The frag cave is a reef-safe structure designed to blend in with your existing rockwork and supports coralline algae growth for an even more natural look.
For more information about the frag cave, visit our online store or contact us today.

Just got word from our purchasers that NP-reducing BioPellets are now in stock and ready to ship.
Available in a 500ml pouch for $54.99 and a 1000ml pouch for $99.99, NP-reducing BioPellets are a filtration substrate for aquarists who want to supply their aquarium inhabitants with large quantities of food without negatively affecting water quality.
Reefbuilders began covering BioPellets in October (follow-up post here) and there is some lively commentary, including a testimonial from an actual user. Even the manufacturer chimes in.
To learn more about NP-reducing BioPellets, visit our website today. If you have any questions, leave us a comment or contact us directly for one-on-one support.