Does this act like purigen? Does it make the water clearer? Or is that the carbon?

The BioMax media is basically an insert that provides a place for beneficial bacteria to grow. These good bacteria will help reduce the levels of ammonia and nitrite in your system. Purigen is an actual absorbing type product that removes impurities from your system water. I listed some differences between purigen and carbon below.Purigen ) Removes things in the water before they turn into Nitrates slowing water degradation) Clears up the water making it sparkling clear) Can be regenerated multiple times) May last for quite awhile before it is exhausted and needs to be regenerated depending on it use) Does not effect or remove medicines ) Turns darker brown color as it is exhausted and lightens again after regenerationCarbon) Removes most medicines) Cannot be generated) Usually is exhausted relatively quickly) Removes things in the water but does not clear the water) Can leech things back into the water it once removed if it is not changed once exhausted) Shows NO changes as it is exhaustedCarbon is similar to the purigen product in that it absorbs odors, discoloration and impurities in your water but they areHope this helps answer your question.

Does it matter what size? I want to save money and get the 70 gal for my 3 gal tank lol

The size doesn't matter, I bought the cheapest one and took the biomax out of the bag so they fit-for a 3 gallon from the 70, divide the biomax bag equally into about 12 piles, then put one of the piles into your filter and save the rest (as you will want to change them out eventually) this should give you enough filtration for a 3 gallon with out overdoing it.

Desertcart Logo

Join PRO & Unlock Exclusive Perks!

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan

Customer Services

About Us

Customer Support

Our Other Brands:Hewyn|Selfship

Reviews

C**S

Never have a filter issue!

Best filter for your tank. Make sure your priming the filter when starting

31.12.2025

V**V

It’s amazing

You get what you pay for this is amazing OK for 4 to 5 dollars to three dollars. This is a pretty good pricing that I’ve ever seen on Amazon to be honest because everything so overpriced now I’m gonna give my pros and cons about this product and honestly, there’s a lot of better pros than cons for the pros. I noticed that this is pretty good in packaging. Technically, I don’t like the blue packaging on there, but we can leave that for the cons. I separated the bio balls in the blue packaging so or the blue packet or whatever the hell you wanna call it and put it into my hang on the back filter for the quantity you get at least one for the money you wanna buy for personally I love this product this product was pretty good in my tank definitely I still need to get more bio media but not from this company cause girl no shade. This company is all right. OK another pro is this does clear out. Your ammonia is better than chemical filtration. just gotta say I use this product a lot and it’s a pretty good product for the cons again the blue packaging. gotta go change it to something like other than blue because and then the extra material on the blue packet in the code of bio balls. I’m like I gotta just cut this off like what the hell another thing is is that there’s nothing really else to give about cons because it’s not a chemical filtration product so I can’t really judge the hell out of this product so you know

6.02.2026

P**L

Does a great job.

Always works great

8.12.2025

C**R

Perfect

This fits in the overflow compartment of my HOB filter. I rinsed it off and let it soak in a aquarium starter solution. I'm hoping this establishes a good colony.

4.02.2026

T**O

Cheaper than our pet store!

Convenient product to order via Amazon and save the drive to pet store.

6.01.2026

L**D

Great filter.

I have a tall 20 gal freshwater tank. Hate to say it but it’s the best filter I have ever used in 20 years. Highly recommend this power filter.

1.07.2025

F**H

Great

These are amazing for beneficial bacteria and work very well!

30.09.2025

A**E

Perfect

15.12.2025

J**S

Good fit, no problems

13.08.2025

P**D

Works alongside foam sponge and charcoal filter to keep the aquarium water clean. Depending on how many fish in the tank, needs to be changed or washed out every couple of weeks.

17.06.2024

A**R

Very useful and gives good bio filtration

1.03.2020

M**I

Indispensable pr une eau bien claire

1.07.2025

D**A

A must for every Aquarium I change mine out once a year. Good quality and price.

15.10.2025

ASIN	B0006JLO5K
ASIN	B0006JLO5K
Age Range Description	All Life Stages
Best Sellers Rank	#5,822 in Pet Supplies ( See Top 100 in Pet Supplies ) #71 in Aquarium Filter Accessories
Brand Name	Fluval
Color	White
Customer Reviews	4.7 4.7 out of 5 stars (9,166)
Date First Available	December 6, 2005
Date First Available	December 6, 2005
Department	Unisex-Adult
Department	Unisex-Adult
Directions	Follow individual packaging instructions for recommended replacement intervals.
Included Components	All Items in Description
Is Discontinued By Manufacturer	No
Item Dimensions LxWxH	1.8 x 2.5 x 3.5 inches
Item Package Dimensions L x W x H	4.13 x 2.44 x 1.73 inches
Item Weight	0.01 Ounces
Item model number	A1370A1
Item model number	A1370A1
Manufacturer	Rolf C. Hagen (USA) Corp.
Manufacturer	Rolf C. Hagen (USA) Corp.
Material	Plastic
Model Name	HAGEN AQUACLEAR BIOMAX MINI\20
Number of Items	1
Product Dimensions	1.8 x 2.5 x 3.5 inches; 0.01 ounces
Size	AC20 (Old) 1-Pack
Specific Uses for Product	Indoor
Style	Biomax
Target Audience Keyword	( reptiles \| amphibians )
Warranty Description	Manufacturer Warranty

Aqua Clear AquaClear 20 BioMax, Aquarium Filter Replacement Media, A1370A1

Details

Description

Specifications

Reviews

Common Questions