Amazon Ratings and Reviews

Indoor Aquatics Biomaster Thermo 350

$191.92

$270.50 29% off Reference Price

Condition: New

Color: Black/Blue

Model: 55149

Style: 4-stage filtration

Top positive review

See all 48 positive reviews

Next Level - Just Buy It

By PhotoB on Reviewed in the United States on June 3, 2025

One of the coolest things ive bought for my freshwater planted tank. The Oase Biomaster 350 is a beast and a QUIET one at that, I have powerheads louder than this thing and I have to touch it to see if its on. The only thing I was disappointed with was that only one bag of bio media is included, the rest are sponges - so I added Seachem Matrix to two of the other trays along with the included biomedia. If youre feeling fancy you can opt for the Aquario Neo Lily pipes size large but the stock pipes are fine, just not as fancy. Water flow is good, a little more mellow than I expected with the spray bar, build quality is exceptional, easy to setup and go and the self siphoning feature is gold. Great price right now too, I have the UNS Delta 90 and it was cheaper than the Oase but the Biomaster is almost twice the capacity and quieter. Wish I'd gone Oase all the way.

Top critical review

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1 people found this helpful

Look like a great design, but the function is severely lacking.

By Joseph Kuiper on Reviewed in the United States on March 7, 2024

I liked the fact of how easy it was to clean the pre-filter section and I liked the fact that the heater is built-in but it never filtered all the particles out of the fish tank because it keeps on getting air bound and each time it purges it disturbs all the matter in the filter, sending it all back into the tank. I worked on it and I finally got it so it didn't suck air in so I thought everything was going to be better, but it never filtered out all the finer particles. After several months, I was done with it and purchased a Fluval. Overnight, I could see a big difference and after several days I am very happy with the results of my new filter by Fluval. A $300 learning experience.