Seachem Matrix Bio Media 1 Liter

I bought this when I got my Eheim canister filter. The 1 liter bottle is the exact amount that I needed. Before I started using this stuff, I had minor issues with ammonia build up even with the bio sponges. Two weeks after I had this in my system, my ammonia and nitrites are at 0ppm and my plants pull out the rest of the nitrates with no problems. This stuff doesnt need to be replaced ever, so one bottle is all you need. Because this stuff holds onto all the good bacteria, you can feel free to replace all the other filter pads and such in your system without feeling guilty. Great stuff.

I received a few different color media but they were mostly white. Theres a good amount of different sizes too. I filled up the filter and used the rest as substrate. It can be cleaned and reused so why not? It looks great.

Ive only had 2 liters of this in my reef tank for 2 months so chemically I can not say if its working but stability with moderate bio-load has been good. Only a few dark pieces found in each container. Im not convinced these are harmful but I took them out for a quarantine tank. Will purchase additional.

When you first open the bottle you will think you just bought a bottle of expensive grey pebbles, but this shit is actually awesome. I decided to try it on a whim to see if it would help keep nitrates under control. I put it in my media basket, added some extra bacteria to the tank for a few days, and a few weeks later its hard to detect any nitrates in the tank. This has stayed consistent for months now. My bio load is moderate, I already use a skimmer, have an active clean-up crew and I feed somewhat heavily. I could easily go months without water changes... but I still do them bi-weekly for overall tank health. I have read slow-ish flow over the matrix media may provide optimal efficiency, but I havent experimented much because the results are already good.

I am using this product in my 32 biocube and results are good It did excellent work on bio filter and keep the water crystal clear , I have noticed the Nitrates is almost 0 since I started using the product Overall another good product from seachem

In all my many years of keeping fish, many have claimed to have products to bring down nitrate levels, but none worked. This is the first product I have found that actually does. And it is cheap. I did use it in my canister filters as opposed to hob, after reading the reviews. Seems some had mixed results that way. But I am amazed at the results I have gotten. It is not immediate, it took some weeks to see it drop, but after two weeks out Im at 10 ppm. Will buy again.

I am using one big bag of Seachem matrix in my refugium for biological filtration. I have never seen any issue with nitrates and phosphates in my tank. I don’t use any skimmer... just the bio filtration. I do think that part of my tank success goes to Sechem Matrix.

Ive only just added this to my canister filter set up...I have a SunSun 304B canister, and added this to my 2nd and 3rd trays. 2L of this was JUST enough to add into 2 trays. I probably should get one more liter and top off both trays. So 3L would probably be PERFECT if you have a similar filter and are trying to fill 2 trays. So far, so good...tank is clearing up. I also added some of this to my HOB filter for my turtle tank and the tank looks great! ONE TIP: Make sure you give these a decent rinse before you add this to your set up...they are pretty dusty out of the bottle, so a very quick rinse will clean that up! Im sharing a pic of the matrix in my trays BEFORE rinsing them so you can see the dust and also see how much two 1 liter bottles will fill.

While it did seem a bit dusty at first, Ive had no problem with it clouding up the aquarium at all. Ive get to do a filter change since receiving it, but the water is still beautifully clear after over a month of running. Theyre wonderfully absorbent and have plenty of surface area. I will remind you that it is one liter, which is half of a two liter bottle of soda. The size took me by surprise, but that was my own mistake. One bottle filled one of the chambers in my 175 gallon canister filter.

I used the whole thing for my 40 gal because my 10 gal has about 1/4 of it. This is a good product. I will most likely add more and take away 10 lbs of live rock. Water parameter are too good.