IceProbe Thermoelectric Aquarium Chiller - 4 in. x 4 3/4 in. x 7 1/2 in.

The good:- Extremely quiet. Only a 3.5" computer fan turning during operation- Works on a 28 Gal aquarium to cool to 79 Deg F- Fits into the back sump of my nano tank with a little customizationThe bad (nothing too bad):- The unit might not be enough if you live in a very warm place without indoor Air Conditioning in your home.- It is quite bulky. It did work in my tank, but with some customization. My probe doesnt fully submerge, but I am not using it per the instructions. Overall I am still pleased.- There is no temperature controller included. You will need to purchase one if you dont want your heater and cooler both running and fighting each other.My install:Even though our home is air conditioned, the pumps, skimmer an lights added heat to our tank. It is only June and we were getting up to 81 Deg F. Our target temp is 79 Deg F, so we needed a solution. I took off the plastic nut from the probe, and also removed the foam insulation from the upper part of the probe. In my JBJ tank, I simply fit it as far down as I could with the bottom of the main plastic base sitting on the back of the tank. In this configuration, the probe is 1" - 1 1/2" into the water which is enough to cool the tank.This unit does not have its own temperature controller. For this, I used the InkBird ITC-308 purchased from Amazon. This unit is capable of running both a chiller and a heater. I hooked both into the InkBird and set my desired temp at 79 Deg F. I then set the offset for heating to 1 Deg F and cooling to 1 Deg F (which is the minimum on the Inkbird).When I installed this on my tank, the tank temperature was reading 80.8 Deg F. It took about 2 hours for this unit to cool the tank to 79 Deg F. While running now, I can see the temp on the Inkbird creep up to 80 Deg F. Once it hits 80, the cooler turns on and drops it back down to 79 in about 30 minutes. It has no problem keeping my tank at 79. If you live in a very warm climate and do not have air conditioning, a single unit of this size will probably not be sufficient to cool your tank. The company recommends using more than 1 unit to achieve a higher temperature drop. I would consider after needing 2 of these to just go the chiller route.

I bought this thing for a 7 gallon recirculating aeroponics system. My reservoirs has about 4 gallons at any given time. And BEFORE I purchased this thing, I would constantly have to put frozen water bottles in my reservoir to lower the temps from mid 70’s down to as close to 68 degrees as possible. Every day I’d have to do this, which was getting to be a pain. So I bought this chiller on a whim and hoped it would keep my temps down. Well, it keeps my temps in my reservoir down below 70 degrees without the need to insert any more frozen water bottles. The product keeps temps about 8 degrees below the air temperature in the room that the fan to this chiller is in. If you are looking to lower temps more than 8 degrees, then you might want to look for something else. The chiller is also pretty slow to chill my 7 gallon recirculating reservoir. But, it keeps the temps below my threshold. So for that, I gave the product 5 stars.

Updated UPDATE: Seller appears to be dodging responsibility. Wants me to ship device back and wait for a refund, which of course means opening a big gaping hole in the side of my tank which it just so happens to plug. I have been working on this for months and have personally invested a lot of money. I am doing privately funded research and design in an attempt to start a business and it looks like this $150 chiller is going to break me. To say that I am distraught is a serious understatement. This is so messed up. I honestly can't believe this is actually happening right now.UPDATE: After a few weeks of perfect function there is no longer any heat transfer from the fins even though the fan is still running and now not only do I have a hole in my tank, but everything will be dead in a matter of days. Completely broken hearted right now. I had such high hopes for this thing.Its definitely holding up its end of the bargain. Anyone having trouble with this product just needs to step up their insulation game a bit and make sure the fins have plenty of airflow. You ain't gonna circumvent the laws of thermodynamics, but it will do the job. Very happy. Thanks much.