OASE Indoor Aquatics Biomaster Thermo 350

I purchased this OASE BioMaster Thermo 350 canister filter on Amazon Prime about a month ago for use with my new 32-gallon fresh water planted aquarium. This canister filter is beautifully designed and engineered in Germany, and built in Italy. This is a VERY high-quality piece of aquarium equipment with several excellent built-in features. I’ve owned aquariums for over 40 years and this is hands-down the BEST canister filter I’ve owned.The pump primer feature is powerful and effective, easy to use, and gets the filter up and operating almost immediately after applying power. The ability to shutoff and remove the 5/8” ID inlet and outlet hoses without spilling any water is an EXCELLENT FEATURE, as is the ability to remove and clean only the pre-filter. The stacking media trays are VERY easy to remove and clean, and allow the use of several different types of filter media. This unit was clearly designed by people familiar with aquarium equipment for people who use aquarium equipment! The built-in heater works great and keeps my aquarium rock-steady at the selected temperature. The pump motor is almost silent with virtually NO irritating vibration. The 5/8” ID hose supplied with the unit is tinted to hide algae and of excellent quality.I give this OASE BioMaster Thermo 350 canister filter my strongest recommendation. While not inexpensive, it works beautifully and is well worth the cost. Please see my photos.

I switched from HOB filters to this filter because I wanted a built in heater and less maintenance. This filter is whisper quite. I can't hear it at all. The built in heater is awesome. The filter requires very little maintenance and my 55 gallon aquarium is running perfectly. The water parameters have been perfect and the water flow is perfect for my planted tank. Priming the filter was a cinch as well. Just a couple of presses on the priming button. I have nothing bad to say about this filter. If you are on the fence, just spend the extra money and buy it. You won't regret it. What are you still reading this? Go buy it!

I've used other brands of canister filters, but this one is by far the best I've ever used. When you consider that it contains an integrated heater, the price is actually quite good. I have mine hooked up to an Oase UV filter as well, which was quite easy to do (I didn't even need any additional tubing beyond what came in the box).Some of the nice features: very easy to remove and clean the pre-filter, integrated heater, large media baskets.One tip is to buy some of your own media; what comes with the filter isn't bad, but you can find better. I put activated carbon in the bottom basket, followed by two baskets of Fluval Biomax bio rings, and then the two layers of the included sponges.I have a 55 gallon rectangular tank (48" long) and the heater is working fine. I set it to 79 F, and I have an external thermometer attached to my aquarium that shows it's at exactly 79 F. It took about a day to warm up completely but now it's holding steady.You really can't go wrong with this filter - highly recommend.

I have had this up a running for a few years. The heater keeps the water warm. Right now it is on a 75gal tank with a few Oscar's and I have had no water quality issues at all.

Let's get the negative out of the way first. When I received this, one of the rubber gaskets internally was torn, so I emailed Oase support with photos asking for a replacement gasket as I didn't want to return the entire product and hold up my aquarium build. I received the automatic confirmation email back, but never received an reply. After 2 weeks, I emailed again. They then promptly replied and said that the gasket was on back order and would not be available for another 4 months. They suggested I return it and get a new filter.I looked at it and didn't think it would cause any leakage, but thought it may lower the throughput of the filter. I chose to go with it and replace it at a later time at my own expense. Hopefully they won't make me purchase a new pre-filter assembly. The filter is working just fine. This made it a 4 star. If the gasket was good, I 100% would have given 5 stars...The only other thing I don't really like about the filter is the intake/output design. There are a few other cannister manufacturers out there that make the transition from hose to tank a bit nicer. The squarish fittings over the top of the tank are kind of floppy, only to have 1 suction cup on the output and 2 suction cups on the intake barely helping to hold it in place. This is compounded by the fairly stiff hose makes for a bit of a twisting bending moving activity to get everything to sit right on the tank. Don't get me wrong, it works, but I'm just saying it could be designed a little better.Now for the good. I pretty much like everything about the cannister. The pre-filter and ease of access. The integrated heater. The build quality and design. I did cut up one of the blue coarse filters to use on the pre-filter instead of using the finer sponge that came with it, but that's personal preference. Internally, I used the coarse filter on the bottom (1st media. Flow is bottom to top in the main part of the filter) the fine filter at the top and biomedia between them.Overall, I am extremely happy with this purchase and unless something catastrophic occurs, I will probably be using these exclusively in the future. I whole heartedly recommend this filter.

For some reason I was hesitant to spend the money on this but glad I did. The pre-filter is a little to fine of a sponge but that's a pretty easy fix if I want. Super quiet. Would recommend.