DON'T BUY AN OASE BIOMASTER UNTIL YOU WATCH THIS VIDEO!

[@LushSaltyAquariums]

Cheers from my fish room channel in Chicago, where I've subscribed to yours :) Love Oase filters and have several but I never use the plastic stuff so no clue what happened in your filter.

[@aquamanaquatics6393]

It was a clients of mine. Thanks for the sub, I don't post too often. Only when I have something worth posting. I came across this when servicing his filter today and had to make a video about it.

[@deep6ed]

The biomaster has prefilter sponges which are very simple to clean and make maintenance a breeze. Ideally the prefilter sponges should be course. Then the bottom filter tray should be medium and fine sponge. The next tray up should be biological media. I favour Biohome Ultimate. Had nearly a decade using this, the oldest is still in very good condition and combined with heavy planting I have very low nitrates. Lower than my tap water. The top tray, more biological media and maybe top with activated charcoal or a resin media such as Purigen. I rinse the prefilter sponges under a tap in my sink, the whole process takes less than 10 minutes from turning off the filter to having it running again. I make sure that the sponges are wrung out well so as not to introduce cholrine/chloramine laden water into the filter. I'm sure other people do it differently but this works really well for me and having kept fish for close to 40 years on and off, this is the best filter and setup I have experienced. Plastic media, in my opinion, doesn't belong in an external or internal filter.

[@aquamanaquatics6393]

Good advice. I setup most of my filters in the same way. I was just shocked at how easily this media broke down. I only setup the filter as it came from the factory as there's another filter running alongside the biomaster.