OASEIndoor Aquatics Filtosmart Thermo 300

The best aspects of this filter are its noise level - pretty darn quiet, and its relatively small form factor. The best thing about it is the heater in the filter canister removing the sight-polluting heating element from the aquarium - a HUGE plus in my book. Filter is not silent. My house is very quiet, but I can hear it now as I type this review out. It is a very, very low, slight mechanical drone - not at all offensive.The not-so-great: Priming this filter is inconvenient - have to take the heater off, pour water into the little hole until it's somewhere *near* the top, but you can't fill it too much, because then when you put the heater back in, water will spill everywhere. The spraybar and intake are not pretty to look at, which brings the overall package down a notch in my view. Why build a filter to get an ugly piece of equipment out of the tank, then include a butt-ugly intake and spray bar? Something more elegant would be much more ideal. Not sure how I like the bio-media tray surrounding the heater. The space there is limited, and if you have previously colonized, larger bio media, not much of it will fit in the space there. You really have to use Oase's small bio media due to the limited size of that chamber if you want to use the middle chamber for other media types (like floss, Chemipure packets, etc).These niggles aside, this product is very well made and inspires confidence in this brand. So much so, in fact, that I just bought their little nano surface skimmer.

I’ve been using this for about 6 months now. It’s nice and quiet, works great, and maintains temperature fantastically.

I've bought a lot of things from Amazon and I've never had a problem. Until Now.First of lets talk about the filter. So far, so good. It was easy to set up, and so far its working perfect. Nice and quiet. I've always used Fluval filters but I heard good things about this filter and decided to try something new.. So far I'm happy with it but we'll see how it holds up over time.Now the reason I give this a one star.The second the filter arrive I was disappointed. The box was all damage and looked like it had been taped back together. The filter was dirty on the outside and a bit scratched. I automatically assumed this filter was used and not brand new. Tubing was clean and the parts inside were sealed. Once I started to set it up I realized parts were missing. Parts for the Inflow and Outflow were missing, looks like a whole bag Lucky for me I was planning to use my glass pipes for the inflow and outflow so I was still able to use the filter with no problem. if I didn't have the glass pipes the filter would have been useless.Unfortunately I wasn't very patient and bought everything I needed at once, Filter, substrate, and plants and really couldn't return it and wait for a refund to get a new filter. I'm disappointed that I paid full price and got a used filter with missing parts. Luckily I was still able to use it. If the filter continues to work for a good couple of years I guess it would still be worth it.If you decide to get this filter, open it and make sure its new and that everything is there. If you get a complete filter, I think you will be very happy with it.

I primarily bought this filter for the size and for the built-in heater. I had a specific space I could fit my filter into, and this was the right size for my 22g long. It keeps the water clear and is very very quiet. Setup was simple, and I think the priming method is very easy. I actually like it better than my "self-priming" filter on another tank. The heater... works? As in, it generates some heat and actually does an okay job during the day. But I think I'm asking too much of a 100w heater. I have no lid, and my house is usually 66-69F at night, so the heater can't keep up. During the day, if my house is 72, it can raise it to 78 or so if it's turned all the way up. But it just gets too low, and I don't like having the thing cranked to 90. So I did end up having to purchase a second heater to go in the tank to actually keep it the 79° I wanted. But I do like having the backup in the filter in case something happens to the primary in-tank heater. So it's a good peace of mind.I also don't like the method of attachment with the suction cups. I would have preferred clamps.Overall, the water is clear and it's very quiet, but the heater isn't amazing because I suspect flow around it isn't perfect. The flow is good given the size.

The unit is very quiet and compact. The value is great compared to similar units at twice the price. The set -up instruction are acceptable. Not the greatest, I had to rely heavily upon the diagrams. Cleaning will be a challenge, the unit is heavy when filled with water. No discernable shutoff for tubes from tank to pump. I expect a bit of spillage while figuring this out (no directions as to how to secure tank hoses during cleaning). Intake and out flow tubes are not sturdy enough in my opinion. Out flow dispersal tube 'rinky dink' at best. No priming instructions, and yes, it requires significant priming. I am pleased and believe I got more than my moneys worth with this purchase.

Lo compacto qué es en relación a la cantidad de agua qué puede filtrar y que llego en excelentes condiciones

Very quiet filter and easy set up. So happy I purchased the filter with the heater built in, saves a lot of room in my small 10 gallon. This filter has a good range for intake and return water flow rate, easy to adjust. The intake pipe is a little too long for my tank but it would be very easy to cut the plastic pipe to size or attach a lily pipe set for a more seamless look. All in all, wonderful filter and I look forward to putting it to use in a larger tank one day.

Una de las mejores compras, desde el empaque se nota la calidad. Llevo un año con el filtro y funciona muy bien, mantiene limpio el estanque casero que construí a mis tortugas. Es un excelente producto de OASE.

Built in heater was my key feature for me. Less equipment in my ADA style rimless tank. Filter is so quiet I have to check it to make sure its running. These are much better than fluval etc and so well though out, even has built in invisible shutoffs for filter cleaning. Ingenious. no mess filter cleaning.

Easy to clean, no need to worry about heater hanging in your tank. Its a very quiet filter unless its not properly assembled. Only con is that integrated heater starts from 100 and there is no heater inside Filtosmart 60 which wouldve been really great for nano tanks (filtosmart thermo 100 is little bit expensive for a small tank)