Clean those impeller shafts!

Eheim Ecco 2235 canister filter impeller with shaft inserted. Photo by the author.


Eheim Ecco 2235 canister filter impeller and impeller shaft removed. Photo by the author.

Three years ago, I posted about keeping your power filters clean, especially the impeller and impeller housing. The point of that post was to help you avoid filter restart problems in the event of a power outage (or when you unplug the filter when you feed your fish or some other reason). Most of the time, a restart failure is due to a dirty impeller housing, dirty impeller, dirty impeller shaft, or all of the above. 

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Sicce endorsement

Sicce logo. Image from

Many of my previous posts mention the equipment that I use. However, I wanted to explicitly mention a company named Sicce. This Italian aquarium products manufacturer produces filters, pumps, heaters, etc. Though lesser known in the United States compared to companies like Hagen (Fluval) and Eheim, IMO Sicce’s filters and pumps are as good or better. If you’re a regular on Facebook, you have probably seen an increase in posts about them and the number of LFSs carrying their products. Though they have been in the states for a while, they are making a big push into the home aquarium market. 

I use Sicce pumps and canister filters almost exclusively. I have for many years. In fact, all of my larger tanks are filtered by Sicce canisters.

If you want to venture out of your comfort zone and try some products you haven’t before, give Sicce a try. 

OASE releases larger canister filter

OASE BioMaster 850 external canister filter (cut-away view). Image from

For the canister enthusiasts among you, OASE North America has released a new, larger external canister filter as part of their BioMaster line. I did a review of the BioMaster Thermo 350 back in January of this year. At that time, the largest filter in the BioMaster line was the 600, rated for aquariums up to 160 gallons. OASE recently released the 850, suitable for 250 gallons. 

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OASE BioMaster Thermo 350 canister review

OASE BioMaster Thermo 350 external canister filter. Image from

Back in October, I posted about having the opportunity to review the new OASE BioMaster Thermo 350 external canister filter. I finally got around to getting that completed.

Let me start by thanking OASE Living Water for donating this canister! What follows is my honest and unbiased review of the filter components and setting it up. If I didn’t like something, I’ll say so. Likewise, if I liked something, I’ll say so.

This is not a review of the canister following extensive usage. In fact, I only ran it about 25 minutes total. If you want a review of this canister after it’s been in use, on a populated tank for an extended period, check out Zenzo’s review at Tazawa Tanks.

Unboxing and Instructions

All components were neatly boxed. Opening the filter box and removing the top cardboard support insert revealed the canister body and a separate box of canister parts (Figure 1). This separate box contains all of the printed material and attachable filter components not already attached to the canister, which consists of the following (see Figure 2):

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OASE BioMaster Thermo 350

OASE external canister filter in shipping box. Photo by author.

Last month, I posted about the OASE company. I mentioned in that post that I would be receiving a BioMaster Thermo canister filter for review. It arrived!

As you can see in the photo above, OASE sent me the 350.  The 350 is one of three in their external canister line. Designed for 90g tanks, the 350 is the middle size of the three. The 250 is the smallest and designed for 70g tanks. The 600 is the largest of the three and makes a big jump from the 350, specifically designed for 160g tanks.

Stay tuned!

OASE aquarium products

Image from

If you’re a pond person, then you’ve probably heard of OASE. They’re noted for their pond and water feature pumps, which drive many of the hotel water gardens and fountains around the world. In fact, founded in 1949, the German company claims to be the world market leader in water gardening products. For the past several years, the company has been busy expanding via the acquisition of several competitors, including the Italian pump company Eden as well as Atlantic Water Gardens.

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