Aquatop BREZA Battery Powered Air Pump with AC Power Failure Sensor – Automatic Backup Power System, Aquarium Air Pump, Versatile & Portable for Aquatic Transport

I will review again after a power outage, but for the test run, I was pleasantly surprised. After reading some of the reviews where people may have complained that it was incredibly weak, I thought wellll, they've got a FIFTY-FIVE gallon of course it'll be weak. My tanks are 10 gallons and 4-5 gallons. Since I needed 2, I purchased this one and another brand and thought I'd compare and if one were weaker, I'd use that on the 4+ gallon.This one is the AQUATOP AC/DC Single Battery Operated Air PumpSold by: Amazon.com LLC $10.97The other one is the Penn-Plax Silent Air B11 Battery Operated Air PumpSold by: OneStopFishShop fulfilled by Amazon $14.991) They both have a box that you open up to put the DD batteries in (2). You can see the "inner workings" of what makes it go.2) Close it and they both have a button on the outside to use for turning it on, like when you want to test it, or if you choose not to leave it plugged in and want to turn it on manually.3) They both come with a short airline tubing (one was 19 and the other 23 I think, inches) and each had an air stone, pretty much identical in shape/size. I used a T junction and added an appropriate length of airline tubing to the one that had a shorter length of tubing. The other one just reaches to hang into the tank and I will duct tape it to the outside of the tank to prevent it from popping out when in use. This works fine right now, since I'm working from home and expecting to use it manually when the power goes out (as opposed to leaving it plugged in and letting it kick in automatically when the power goes out, which I will set up when I know I'll be gone for an extended time.).4) They both have a power cord. This one, the Aquatop had the shorter cord at around 3 feet (check the specs) and the other one had about 5 feet (again check the specs), so depending on where you want it, that might impact choice, but there's always an extension cord that can be used. My set up just happened to work fine for both of the tanks... I've got this one on the 10 gal and the other one on the 4 gallon.5) While the case on the Aquatop seemed a little cheaper or more cheaply made maybe, I didn't see ANY difference between the 2 in production of bubbles.6) I was surprised how bubbly they both were! I don't have an air stone in either tank, so the bubbles are little by comparison to the ones from my sponge filter on the 4 gal (the 10 has an Aqueon 30 power filter, so no bubbles to compare). But, there are a TON of them coming out of those little stones!The summer storms have kicked into high gear and as I already lost power earlier in the season for a couple hrs, I won't be surprised if I need these! Although with Murphy's Law, now I won't... but I can tell you that the peace of mind I'll have is great with BOTH of these items.Will update if needed and I use them for any prolonged length of time.UPDATE: Used when out of town for 4 days and I know there was a power outage (probably only a couple hrs as the ice in the freezer had only melted a little) but both worked fine. I think the battery usage is good too as the batteries were NOT new and yet have worked fine for several hrs and still have some charge. BE CAREFUL about creating a drip loop. I did not and after I took the line and stone out of the aquarium, I noticed the tubing had water in it. I didn't have a place to set it up properly, so I'll have to figure that out for next time. But, the water parameters were fine after I returned so it must have gotten water in it AFTER it stopped. One thing though... when I went to pull the air stone out of the tube to dry the tube, it CRUMBLED!!! I don't know which stone came with which setup but they were virtually identical. I will just replace with another stone. Not sure why that happened, the stone was still wet but I don't think it should have broken up when I went to pull it out of the tube. Still worth the money and great product. Just don't know what the heck with the stone.

Works fine off battery; a little weak, but works to keep water moving and aerated in my 10gal. It's a little noisy if you're in dead silence, but running with power, it's easily drowned out by a fan running. THE PROBLEM IS, it does NOT use the cord to actually supply any power. I ordered one, which worked "great" for three days ON POWER. I bought this air pump specifically because the power grid around me can be a little unpredictable and I wanted my pump to switch to battery automatically. This does not do that. The power cord is basically a prop. It doesn't power the pump at all. Once the batteries die, the pump dies, even if it's plugged in. I figured I just got a faulty unit and put in for a return/replacement. Got the new pump and decided to try it with JUST the power cord, and it doesn't even attempt to turn on. Ok, so maybe there's something that requires batteries to be inserted ( which looking inside, is doubtful, but just to be thorough). Put in the old, now dead batteries from the last pump to make sure it'd only be using the cord, still nothing. You could just get a regular battery-operated air pump for $5-6 cheaper that'll probably have right around the same noise level since the main draw of this product is just a gimmick.On the plus side, battery life is good LOL

It is very hard to find an inexpensive AC/DC air backup air pump. This unit is ONLY for DC/backup (it does NOT run on AC and does not recharge batteries) so it cannot be used like the far more expensive 24/7 AC/DC air pumps with battery backup but It is excellent for its designed use. Running with two DC batteries, the air pump produces an active flow of bubble with 36" tubing (22" included) and comes with a 67" power cord so it may be conveniently placed near many aquariums without an extension cord.Edit: the 36" airline ultimately turned out to be too long once filled with water. Shortening it to the original 22" length, however worked as designed.

Just received the pump today and couldn't wait to try it out.Let's start with the good, it works and the best feature is it turns on automatically when there is a power outage. It came with a airstone and tubing that I wouldn't use, but nice touch.Now the not so good, it looks cheap and is the loudest air pump I've ever heard. There no way to lessen the noise, it's just the way the pump is made.Anyway, it's a nice cheap insurance policy to keep your fish alive during a power outage. It was cheaper, I paid $2 more just because I didn't need it when it was cheaper. I bought three and figure I could run sponge filters and/or air stones in my tanks for a few days easily.

I works pretty well, although I will probably buy another one to get additional air flow. I teed mine into the existing air line just past the one way valve so air wouldn't flow into the other pump. It only runs when the power is off, or you unplug it. It is kind of loud, but that's good since sometimes you accidentally lose power to your tank when the power is on in the rest of the house. I plan to check the batteries on the same schedule as my smoke detectors.

It turns on automatically when the power goes out, which is great, and does a good job of keeping airflow in the tank, but it is very loud! If you do get it, keep in mind where the tank is relative to humans - in my apartment, it's right outside my sister's room and wakes her up rattling everything if we lose power even just momentarily in the middle of the night.