The 8 Best medium balls (2023 reviews)

Marineland medium ball is the epitome of what a great ball should be. Turtle tanks really need as much mechanical filtration as you can possibly provide plus weekly partial water changes. The mini generic mini bioballs with the sponge in the middle are better, BUT will get clogged faster, need to be cleaned every 6-12mo, these can probably go 2 years without cleaning. The water flows through them (of course since they are designed for that purpose) and they do float at the surface. The canister does an amazing job of keeping turtle tanks clean.

These bio-filter balls have lots of surface area for bacteria to colonize, much much more than ceramic rings. They are the perfect solution for offering birdbaths, drinkers, water sources for any small bird or insect that needs to be able to climb back out. You can fit 40 very nicely into the e-size emperor media cartridge as well if you're looking to increase your bioload capacity there.

Why We Like This:

Excellent quality product, makes your fish tank look like a professional tank
Great size bio balls for even the smallest of canister filters
Include tank size, individual maintenance habits and fish population
Tiny, fits in any chamber, not for a wet dry

Best Runner up: aquatic experts medium ball

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Aquatic Experts line of ball come in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. Molded from high density plastic, these bio media balls are lightweight but tough enough to keep their shape and will never degrade or wear out. These have a small solid center covered in spines that won’t trap gunk. This makes these heavy-duty bio balls perfect for pond filters for outdoor ponds or as a bio media for aquarium filter. It has tiny pores which make it difficult to clean while bio balls in most applications never need cleaning. It has a sponge in their centers to increase surface area, but sponge pores trap gunk that does not wash away. This trapped gunk reduces water quality and will never degrade or wear out.

Why We Like This:

Can be used in aquatic experts mesh media bags or loose
Easily remove water toxin and more
New and hot release

Best For keeping A steady flow: AQQA medium ball

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The aqqa medium ball should be able to handle its purpose and duties with ease. This filter can use on saltwater or freshwater, this is a complete filter with electric power filter, no need a air pump. It can be sucked tightly around the fish tank or the bottom without sand. The tank has blue bolt shrimp which require good water quality. It is very quiet, noise is less than 30db,selected with high-quality motors, longer service life.

The water flow is great and it is extra quiet. It provides additional media for biological filtration. It doesn't need an air pump to work well without and has an powerful output jet and keeps tank crystal clear.

Why We Like This:

Neatly packaged and comes with everything you need
, can be use on acrylic fish aquarium tank
One of the new comers and featured product

Best For various aquarium filters: Mei Ting medium ball

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The mei ting medium ball is capable of outshining several other ball featured in this list in overall features for the price point. The combination of various filter materials can biologically purify fresh water and sea water to improve water quality. These are composed of a variety of high-efficiency biological filter materials for aquariums. Using its special structure and pores to parasitize more nitrifying bacteria, the purpose of eliminating harmful substances in water is achieved by cultivating nitrifying bacteria. It provides essential minerals for fish growth while cultivating beneficial organisms.

It can be used in all biological internal filters, external filters, drop purification filtration systems and garden pond filters. The biological medium needs to be rinsed with water before use.

Why We Like This:

Can be used for your hob filter
Can be used as pond, fish tank, aquarium suspended filter, electric filter, etc
Lot of satisfied buyers

Best With name: green Vista Water gardens medium ball

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These bioballs are a better bio media choice than lava rock and are much lighter weight than that filtration method. It helps your water feature thrive with green vista jumbo 1.5 inch bio balls and bioball filter media. The included Hydro-Bugs Beneficial Bacteria jump starts the bio filtration process.

These are used in ponds, including koi ponds, aquariums, hatcheries, tropical fish farms, waste water systems, cooling towers and additional commercial and industrial systems. It also cleans or filters the water as the Bioballs combine with organic waste. They also weigh much less than lava rock, making them easier to handle. The Bioballs are also used in ponds, including koi ponds, aquariums, hatcheries, tropical fish farms, waste water systems, cooling towers and additional commercial and industrial systems.

Why We Like This:

Lightweight, superior filtration media, bioballs are effective in various water features
Long lasting, green vista bioballs do not have to be replaced
One of the new comers and featured product

Best premium: Aquaneat medium ball

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We would, of course, be remiss if we didn't mention aquaneat medium ball for daily purpose. New design of bio-sponge inside, the filtration capacity is maximized within much smaller filter areas. They promote gas exchange and increase dissolved oxygen levels, then filter the water as the bio-balls combine with organic waste to dissolve it.

Why We Like This:

Reusable media bag for easy handling
Good investment for long term

Best Easy To Clean: J-Star medium ball

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The j-star medium ball is suitable and reliable and fits well with your daily usage. The pond filter media is light in weight and easy to carry, it can be used in seawater or freshwater. It is hollow sphere made of plastic material, which has a large surface area. Each filter media ball is 26mm in diameter which is easy to clean. It can be used in seawater or freshwater.

Why We Like This:

Delivers what they promise
Lot of satisfied buyers

Best value For money: aquatic experts bio ball

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We would, of course, be remiss if we didn't mention aquatic experts bio ball for regular usage. These 1” bio balls are perfect for the limited space of an aquarium sump. Molded from high density plastic, these balls are lightweight but tough enough to keep their shape and will never degrade or wear out. These are manufactured for use in koi ponds, freshwater fish tanks, saltwater aquariums, aquaponics, fish hatcheries and much more.

These have a small solid center covered in spines that won’t trap gunk. It has a sponge in their centers to increase surface area, but sponge pores trap gunk that does not wash away. These are covered in spines to dramatically increase the surface area of each ball providing space for a massive number of beneficial bacteria to colonize. This trapped gunk reduces water quality.

Why We Like This:

Easily remove water toxin and more
Lot of satisfied buyers