This is an impressive filtration device. The HOB filter can’t handle the bio load on its own The Ziss cleared the water in 24 hours. And the fish appear to be more relaxed. The 40 gallon is barely enough for two goldfish … who keep spawning. Now there are about 18 young from their last 2 spawns which has required daily water changes. Now I can change water only every 2 or three days.

Using this for extra biological filtration and it just looks nice in the tank. It’s much bigger than I was expecting. Easy to set up. Suction cups are really good. It took a few hours for the media to start really moving good after running over night the next day it was flowing nice.

I use it in my flowerhorn tank he can be quite destructive but he can’t hurt this filter

I love this product. I have noticed a change in my fish health. I use a canister and clean it when the flow starts to decrease. This canister intake clogged one day and the flow was obstructed leaving the bio-media in the canister to quit functioning. I thankfully had no fish die. I bought 2 of the Ziss filters and now have a great back up for the bio in my tank. I have a list growing for my next purchase. This store gets bettter and better every year. Thank You for helping with your expert testing of your equipment you sell, it makes my job that much easier.

I’m new to fish keeping (2 years) and only recently have I gotten water parameters to where fish aren’t dying. Only problems I was still having is high alkalinity and having nitrate/good bacteria stick around. After watching hours of content from Cory at Aq co op I started using fritz 7 bacteria. I would get desired levels of nitrate but keeping it that way was a little hard. Then I saw this piece of plastic with plastic inside of it and air flowing through it. Of course I was very skeptical but then researched extensively on the ziss bio filter and went ahead and gave it a try. For the simplicity and low price of this thing it’s hard to believe it can be so beneficial. 4 months ago I put this in my 45gal and haven’t done anything but clean the bottom sponge 4 times. Results are amazing I haven’t had a single worry about good bacteria since I’ve been using fritz 7 and the ziss bio filter

This is running in my 65 gallon tank and I'm very pleased with this product. I done my research and watched Cory's video on it before I purchased it. The constant over turn of beneficial bacteria and oxygen is something every tank could use even if you already have filtration and it really doesn't look bad in your tank. I would purchase again without hesitation.

Well I jumped on the ziss filter train over a year ago when I was setting up a new fishroom. I bought over a dozen of them. Not only are they ugly (which I had already made my peace with) but essentially they do nothing but take up valuable space, provide a great surface for algae to grow, and use an air valve port I could otherwise use to drive another sponge filter. Essentially it’s a clunky air stone. I ended up taking them all out. Then they sat in my fishroom sink for weeks while I struggled to get the lids off to clean them. I never managed to get them off after many, many, many attempts. Just prior to taking a hammer to them, my husband came to my rescue (and theirs) and muscled them open for me (although he too, struggled quite a bit with them). Today I am using them for parts. For example - I solved a problem where I was loosing fry during water changes thru the pvc/bulk head assembly. I was afraid to put sponge in the pvc pipe because I didn’t want it to fall inside and hopelessly clog my pipes. I cut small circles in round sponges inside the bottom of the ziss filter. One to make a “ring” around the pvc pipe and a second to cap it off, and then added the plastic piece with holes. Works like a charm. The rest of the ziss parts (like the media and the canister itself) are sitting in a garbage bag, awaiting inspiration or a spring cleaning day. Paid waaaay too much for these things. Do yourself a favor. Keep buying from aquarium coop. They are a quality operation. But stay away from this product. Just pop one or two sponge filters in and call it a day. I keep two in each tank to rotate cleaning cycle without undue disruption of beneficial bacteria (even though I rinse in tank water). Sorry Cory- I love and rely upon your advice and channel, but this was an expense swing and miss. I do appreciate your extensive testing approach. Keep up the great work!

Easy to set up. Suction cups support the filter well. I added a layer of floss at the bottom to enhance filtration. I used a 20-40 gallon size air pump and the media is boiling after a couple days of start up. Set up just one week ago so it's too soon to tell if it's effective but it looks really cool and the angelfish like the bubbles. I would recommend getting one of these name brand units as the quality is top notch.

Since adding the Ziss Bubble & a Sochting Oxydator my community/shrimp aquarium has flourished. My shrimp finally colonized, my nerites started laying eggs everywhere & my plants are out of control. Combined with sponge, hob filter & co2 injection, the plants, snails, shrimp, clams & fish can take all kinds of parameters without being stressed. It completed my main aquarium.

Running in my 47 tall aquarium in addition to a sponge filter works very well and my gara love sitting on it in the bubbles.

This is my first time using a Ziss filter. It’s in my 40gallon and started working after I connected to the right air pump size. Like others have said it is loud and the suction cups are difficult to budge. I love that it’s adding good stuff to my aquarium. I do want to figure out how to mitigate the loud bubbling.

I have used sponge filters for the past decade but when I saw this. I knew this is the now generation bubble filter. The moving bed media is the best in all filtration system when it comes to ammonia reduction. The moving bed sump is best for larger tanks but for tanks below 90 gallons, I think this is the way to go. I have bought a few of these already and slowly am replacing all my sponge filters with this. The free maintenance moving bed is simply the best. Great for your aerobic bacteria to keep ammonia and nitrite to 0ppm. For fish sensitive to nitrate you will need a very different environment for the anaerobic bacteria to reduce Nitrate. Perhaps my only two problem with this are the mechanical filter at the bottom. Meaning it’s not completely maintenance free like a moving bed sump. Also I’ve only had this for a few months and I’m not sure of the media inside will be as good as the better known fluidize media like K1. With that I can only rate this at 4 star.

Works very well

We started the hobbie about a month and half ago. We are running one Ziss Biofilter on each tank in tandem with an aqueon mechanical filter. Everytime we clean or water change, the tank is clear in 5-10 minutes. The bubble filter also helps oxygenate the water. Pretty sure our Peacock Gudgeon spawned behind it, cause now we have Fry. Tanks are running great with 0 Ammonia and Nitrite.

Replaced my air stones in all my tanks with these. I love them.

As easy as air! So far so good! I’ve only been using this filter for a couple of weeks. So I’m still testing it out. But I like it a lot. Was surprised with how quick I received my order. I just started watching YouTube and found aquarium coop! Glad I did! Corey is very helpful. Hope to meet him someday in person. Seems very real! A great friend to have! Will have no problem shopping with aquarium coop again.

I started getting a few rings rolling right away and was able to speed up the process by lowering the power to my sponge filter. I have a 130g, with A pump rated for a 100g and to get the suction I want for my sponge and the heavy roll I want for my ziss I’m definitely going to upgrade.

However, I kept my sponge turned down a few days and let the ziss do it’s thing. I have two fantails (they aren’t large yet...plan on getting at least one more) and a mess of other fish. I stopped didn’t do my gravel vac/water change to get all the crap out and the nitrites registered nada. I had a very safe amount of nitrates, but the tank is planted, and plants gotta eat!
Couldn’t believe it started getting ammonia converted so quick.

Curly and Larry are grateful 🤪

I added this filter to a 75 gallon with an Oscar and a Sailfin Pleco just for a little added filtration. Water seems to be slightly clearer (polished) but I like that fact it’s another great place for bacteria to grow and help maintain the system. I will be buying several more in the near future !! Thank you aquarium co-op for all your great products.

Super easy maintenance keeps good air and circulation in my aquarium and gets the job done

Ordered this my Ziss a couple of weeks ago. Shipping was fast and received all my products ahead of time. I live in Puerto Rico so getting my stuff on time was a bonus.
Set up was fast and easy to install, pretty much plug and play. Love the biological filtration it gives the tank and I enjoy the sound of the bubbles/aeration. Reminds me of my days in the pet industry.
So far the Ziss is doing its job. I have it on a 36 gallon bow front along with an Aqualear 50 and Penguin 200.
Will be purchasing more of these as I intend set up a 75 gallon next.