sera siporax Aquarium Bio-Filter Medium for 53 gal. | Maximal Optimization of Biological Filtration | 10.2 oz. Aquarium Filter Accessories | Biological Filtration for Aquariums

Got it for less than half the price on Amazon warehouse! That was a steal. Looks like a good quality product, rinsed it off and dropped the media into the filter along with the nylon mesh bag it came in. Not much debris. I have this media along with seachem matrix in my canister filter and nitrate levels are near zero, water crystal clear. Fish all look happy. Highly recommend.

Good price good delivery

Outstanding

These are superb. I was having an ongoing problem with high nitrates and since I started using these (about 3 weeks now) I haven't had any problems. Highly recommend!

The open cell structure gives much higher surface area than competing ceramic rings. Similar design to BioHome ultimate in that it's open cell, sintered glass. But this one won't drop your filter output to near zero, as it lets water flow easily. This is the only bio media you'll ever need.

Came without the so-called bacterial booster. I don't think they claimed it is included, in this case. It came without one single ring crushed!Does it work? I've used this product for years and if sintered glass really is that efficient, then this is the best product. It doesn't seem to shed particles and deteriorate. I'm not convinced that this is better than 30 ppi foam or pot scrubbers, for that matter. Anything on the internet is hearsay, advertising and unscientific.In order to save space in your filter, you may stack the pieces rather than spreading randomly.

I like the product it’s well made not fragile at all and not dusty/crumbs. The only thing is little expensive with small amount of media.

Excellent. I'm doing a fishless cycle with ammonia on a new tank. I wasted money on a couple of different brands of bacteria starter and none of them worked. I got the Siporax with the small bottle of starter included. I followed the instructions, adding the liquid directly to the Siporax media (it's pretty dusty from shipping, so I rinsed it first). The very next day I had nitrites on my test indicating the bacteria was starting to work. Now a week later, it looks like my cycle is almost finished!I don't know if the Siporax is really better than ceramic rings or whatever, but the Sera bio starter included definitely worked for me. I wish I could find it for sale separately.