Juwel Cirax Bioflow 3.00 Compact Filter Media

Used this in a 60L Juwel tank with the Compact Bioflow system—slots straight into the media basket, no trimming or faff. Ceramic granules are packed in a mesh bag, so it’s clean to handle and easy to rinse. Within a few weeks, ammonia and nitrite levels stayed rock solid, even after heavy feeding. I’ve used it during tank resets and cycling—holds beneficial bacteria well and doesn’t clog fast. Ideal for setups with shrimp, fry, or sensitive fish where stable bio-filtration matters. Works well alongside mechanical and chemical media. 🔍 Specs & Features Type: Ceramic biological media Size: Compact – fits Juwel Bioflow 3.0 Compact filter systems Packaging: Mesh bag for easy handling Function: Supports nitrifying bacteria for ammonia/nitrite breakdown Use: Freshwater and marine tanks Lifespan: Up to 12 months before replacement 🧪 Performance Bio Capacity: High surface area—great bacteria colonisation Water Stability: Keeps ammonia/nitrite in check Ease of Use: Drop-in fit—no prep needed Durability: Doesn’t crumble or compact over time 👍 Pros ✅ Boosts biological filtration—ideal for stable tanks ✅ Mesh bag—easy to rinse and replace ✅ Long-lasting—up to a year of use ✅ Fits Juwel Compact filters perfectly ✅ No clouding or chemical impact 👎 Cons ❌ Only fits Juwel Compact systems—limited compatibility ❌ Not reusable—replace after lifespan ❌ Doesn’t handle mechanical or chemical filtration—bio only ❌ Can trap fine debris—rinse monthly 🧭 Personal Verdict If you’re running a Juwel Compact filter and want clean, stable bio-filtration without the faff, Cirax earns its spot. I’ve used it across fry tanks, shrimp setups, and community builds—no drama, just solid bacteria support and clean water. Proper stash-ready gear for anyone who wants their tank chemistry sorted and steady.

Got size M for my 120L tank. Honestly, I don’t mind that it’s not fully packed inside the basket. It’s got a decent amount in it, I don’t know what people are complaining about. It does it’s job, my fish have approved it!

Difficult to assess the effect, appears to have a long term effect

This ceramic media is a must for a stable aquarium, the amount of bacteria this stuff can hold ensures you will never have a weak colony to carry out the nitrogen cycle. The biorb filters are terrible but the lava rock, like this stuff, has incredible surface area for bacterial growth which is what powers the biological side of filtration.

Purchased two of these to replace the standard sponges supplied with the filter by Juwel. Installed them one week apart in the bottom part of the filter to give the bacteria a chance to colonise the media. Ammonia & Nitrites have remained at complete zero. No colour at all with the Nitrite test, even if left for a few hours. Great price on Amazon!

I bought 2 of these to start with for my juwel trigon reef tank which had been set up for 2 years plus. My nitrates were going up due to one of the fish added 4 months before buying this product (fast growing fish). I didn't want to use carbon dosing so I bought this to increase biological filter. After 6 to 7 weeks nitrates began to fall. Highly recommended.

Using in a 5ft 450lt tropical planted tank. Juwel products can always be relied on. Their Bioflow filters are excellent if they are used as per instructions. Just rinse and put this product in and leave it to start working.

Product is good always does its job, BUT DELIVERY WAS POOR LEFT IN AN UNSECURED PLACE HAD TO SEARCH FOR MY PACKAGE

Good product

Prodotto ok e spedizione veloce

Lätt att installera hoppas att den gör nytta oxå

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