Cobalt Aquatics Rescue + Air Emergency Air Pump Kit: The Definitive Review

by | Jan 29, 2019 | Equipment, Industry, Science | 0 comments

cobalt aquatics rescue and air

I am going to make it easy for you this time around. If you just stumbled upon this review while researching an emergency device that may one day save the life of your aquarium inhabitants, or you simply like reading my reviews (thank you :), I have only four words to say to you: “Go get this device”. It’s a no brainer. Case closed.

Fine, I can put more effort into it; it is a Definitive Review after all. You may ask yourself, “Why should I get this thing when there are other such devices that came before it and are proven to work?” Well, imagine that you take this proven idea that has not evolved for the past two decades and finally improve on it, bringing it to the 21st Century. That is exactly what Cobalt Aquatics did with Rescue + Air.

Cobalt Aquatics Rescue + Air is a DC powered air pump kit that can provide up to 72 hours of uninterrupted operation in the event of power outage. For those unaware of the essential nature of this kind of pump, having one can literally save your fish and corals from suffocation. When there is no power, everything in your tank shuts down. Contrary to the popular notion that the heater is the most needed device in such a situation, fish and even some corals can survive in less than optimal temperature for hours if not days. It’s the lack of oxygen exchange at the air-water boundary that will kill your animals the quickest. Bubbles generated by a simple airstone hooked up to a battery- operated air pump create enough water agitation at the surface to dramatically increase the exchange of oxygen between these two worlds. It’s a proven concept and you can find hundreds of documented cases where an air pump saved the unlucky aquarist’s day.

What sets Rescue + Air apart from legions of similar emergency devices designed for aquarium use is that instead of it being powered by an army of “AA”, or, in most cases, expensive and huge “D” type batteries, Cobalt Aquatics’ pump has a built-in rechargeable one. On top of that, that battery can be recharged by any type of standard USB type charger, be it a mobile device charger, a 12V car USB charger and yes, even a USB power bank. Of any size. Now let’s take a closer look…

The Rescue Family

cobalt aquatics rescue and air

It’s worth mentioning that Cobalt Aquatics’ new DC air pumps come in different flavors. In addition to the kit I am reviewing, Cobalt also sells standalone units, one with single and one with double outlets.

The single air outlet versions are identical in both the Rescue + Air and the standalone pump (minus the color scheme). The internal battery in both provides 1200mAh of electric power, which translates to a maximum 24h of operation (according to manufacturer).  The pump diaphragm generates 19gph (72lph) of air output and maximum operational depth of 60”. The dual output standalone pump uses the same battery and has a 47.6 gph air output.

The main difference between the standalone units and Rescue + Air is that the latter comes as a kit, complete with its own additional power bank, an airline with an airstone, and a USB type wall charger, while the former consist of the pump and nothing else. The trade-off is a lower price for the standalone, naturally. Since I received the R + A kit for this review, that’s what I will be focusing on, however, my findings are applicable to the stand-alone unit as they are essentially counterparts


cobalt aquatics rescue and aircobalt aquatics rescue and air

Rescue + Air comes in an ordinary cardboard box with basic information and detailed photo of all components included in the package. Those are:

  • Air pump with built-in 1200 mAh rechargeable battery
  • USB to DC plug power cable (to charge the unit and to operate in plugged mode)
  • A 2600 mAh, 1A rated power bank, complete with a micro USB charging cable
  • a ceramic airstone with 32” (80 cm) 3/16” diameter airline
  • Printed instructions in English, Espanol, and Francais


There is nothing to complain about in terms of R + A’s build quality. The pump is compact and very light, given its relatively good air rating. A hard plastic shell the size of a bar of soap protects the internal components. There are four rubber feet and a tank rim clip (for a ¼” glass thickness max) on the underside and an operation panel on the upper side. The panel features a four-bar power level indicator, an on/off and 10 sec pulse (more on that later) LED indicators, as well as a centrally located power/mode button. The right-hand side of the unit reveals a 1.5mm DC power connector protected by a rubber cover and in the front (up if hung by the clip) we have the airline outlet.

cobalt aquatics rescue and air cobalt aquatics rescue and air

Taking the two halves of the cover apart reveals the tiny pump diaphragm, an AC/DC power converter, and a 1200mAh internal battery which the pump relies on for power when none comes out of the wall. Although there is no gasket between the cover halves, Rescue + Air has a fully sealed operational panel and the earlier mentioned DC connector cover, which means that it can take some random splashes and high moisture from the tank.

cobalt aquatics rescue and air cobalt aquatics rescue and air

The airline that comes with R + A is of the flexible, silicone-based kind and although it’s a tad too short to be fully useful in larger aquaria, it is nevertheless a standard 3/16” and can be easily replaced with something longer should you need that.


cobalt aquatics rescue and air

Rescue + Air comes with its own power bank and again, apart from boosting a matching color scheme with the pump, it is but a standard USB power bank, like the ones that people use to keep their phone charged on the go. You can even use it for that purpose if you wish. A 2600mAh cell inside translates into 48 more hours of operation, in addition to the 24h max running time of the pump’s internal battery.


cobalt aquatics rescue and aircobalt aquatics rescue and air

I made two separate sets of tests, where I set up the pump on my desk and turned it on at hours I usually spend working on my PC, so that when I returned the next day I could witness the exact moment the pump turned off (with hopes that the advertised running times were close to reality). My settings were: constant air w/o power bank (only internal pump battery) and constant air with power bank, each test repeated twice. The results (rounded to next 5 digits) are as follows:

Test I (minutes)Test 2 (minutes)
w/o power bank12h 10m12h 40m
With power bank35h36h 45m

I give credit where credit’s due, but Cobalt deserves a little bit of criticism here. Although I was fully aware that when they advertise the pump’s battery provides UP TO 24h of uninterrupted power they meant “up to 24h in 10 sec pulse mode” (classic marketing gimmick), you can’t find that out from the packaging or from the printed instructions included in the package. Hey Cobalt, you need to do some cleaning up in the labels, put a little asterix next to the 24/48h, ok?

Nevertheless, 12/36 hours of air is an excellent result. To get 12 hours from my crappy “D” battery operated air pump, I had to drain two of those cells dead. Each one worth about $2.50. We have to put things into perspective- yes, it’s not 24h of constant air, but it’s also not $5 dollars spent every time you need to use it for that period of time. Many of you may also remember what can happen if you forget to take out the batteries and leave the pump in a humid environment- a slow-ticking time bomb.


cobalt aquatics rescue and air

This is the area where Cobalt Aquatics really deserves praise, because the amount of functionality they manage to pack into the single button operated, ordinary looking pump is quite astounding.

Let’s start with the obvious- R + A has a 5V powered DC pump that can be recharged via USB chargers. The amount of “juice” it provides just from its internal battery is more than enough to go through a full day of no power in the house. Now imagine how long it could last if you switch to a larger power bank. Well, I did just that and hooked the pump to a massive 28500mAh I’m using for car camping, turned the pump on and just left it there. I came back 7 days later and there was still one bar left on the power bank! Big, big thumbs up to Cobalt Aquatics for that. You can virtually have this thing running for weeks, given that you have at least two power banks and access to a USB car charger to recharge them.

That’s not even the best thing that adds to R + A value…. Well, maybe it is, since having an emergency air pump that can run for days at a time is all you need from life. Anyway, the single, centrally located button that switches the pump on/off also switches between two pre-programmed modes- constant, which doesn’t need explanation, and a 10-second pulse, that turns the pump on in 10-second intervals, essentially doubling the battery life. Now check this out- if you plug Rescue + Air into a 120V outlet using the supplied power adaptor (or any USB charger for that matter), turn it on to see if it works and hit the power button again, the unit will go into the power outage mode. Approximately 5 seconds after the pump’s internal electronics senses the main power source is cut-off, it automatically turns on and switches to battery mode. Brilliant!


cobalt aquatics rescue and air

Who would have thought that Cobalt Aquatics could put so much functionality in a battery operated air pump? Rescue + Air represents an essential piece of equipment that has been radically improved in comparison to what we have dealt with for so many years. A device that every reefer out there should own, especially in today’s world where major weather episodes are becoming more frequent and more violent. It can literally save your aquarium’s inhabitants from death by suffocation. Not only that, R + A provides a great way to keep the water oxygenated when transporting fish and other sensitive livestock. As I said at the beginning of this review, it’s a no-brainer.

On the negatives, the previously mentioned misleading advertising. I took it for granted that 24h is in a 10-second interval mode, but some buyers may feel deceived by this less-than-clear labeling. I also wish the airline included in the package was a bit longer and that the power adaptor was a micro-USB type, which would allow me to use one of the many USB cables laying around, but those are relatively small flaws that can be corrected on the user end rather easily.

Rescue + Air sells for $39.99 and can be purchased at all major reef supply stores, as well as directly from the Cobalt Aquatics online store.

air stone

One final word before I hook up my R + A permanently to the back of my tank- if you look at it closer, this device opens a window to what could become a new era of aquarium specific emergency devices. By using the USB standard, the possibilities of implementing it in other devices seem endless. How about a small USB powered fan to keep temperature stable in a nano aquarium when power is off? Or a tiny powerhead that would provide water movement for hours, using power stored in batteries you may already own anyway? Cobalt Aquatics or others, get to it, I’m sure it will be another big hit, just like R + A.

cobalt aquatics rescue and aircobalt a

Thanks for reading. Now put your fancy LED light purchase on the back burner and get that pump. You will thank me, or rather Cobalt Aquatics for releasing it, later.

  • Marcin Smok

    Marcin Smok is a reefer, photographer, traveler, SCUBA diver and avid DIY-er. He has been keeping freshwater fish tanks since he was 9 years old and saltwater tanks for the past 10 years. Check his photography site at and follow his Facebook profile

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