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 AquaClear Power Filter 50 Gallons Ul Listed Includes Carbon Biological 110 V NEW $65.99 Time Remaining: 13d 2h 5m Buy It Now for only: $65.99 |
 Fish Tank Ceramic Rings Biological Filter Media and 30 Bio Balls For Filtration $8.49 Time Remaining: 5h 25m Buy It Now for only: $9.95 |
 Eheim 1 Liter Substrat Pro Biological Filter Media $17.26 Time Remaining: 24d 11h 23m Buy It Now for only: $17.26 |
 Eheim 2 Liter Substrat Pro Biological Filter Media $27.17 Time Remaining: 24d 12h 2m Buy It Now for only: $27.17 |
 Pump Biological Mechanical Filter 750 Gallon Ponds NIB $15.99 Time Remaining: 1d 14h 10m |
 CPR CR500 WET DRY BIOLOGICAL FILTER 60 Gallon Tank Made in USA $115.00 Time Remaining: 14d 11h 32m Buy It Now for only: $115.00 |
 AquaClear 20 Mechanical Biological Filter Foam A 1390 $10.00 Time Remaining: 18d 6h 57m Buy It Now for only: $10.00 |
 sera Siporax Biological Aquarium Filter Media 10 ozs $16.29 Time Remaining: 11d 21h 4m Buy It Now for only: $16.29 |
 Sea Storm 125 Fluidized Bed Aquarium Biological Filter with internal pump reef $9.99 (3 Bids) Time Remaining: 1d 14h 15m |
 BIO FIBER BIOLOGICAL FILTER FRESH SALT WATER Durable Bonded Fiber Materail $3.75 Time Remaining: 6d 12h 28m Buy It Now for only: $3.75 |
 Atman Aquarium Biological Under Gravel Filter plant 1200L H pump GF 1000 $84.50 Time Remaining: 20d 15h 38m Buy It Now for only: $84.50 |
 Fish Tank Ceramic Biological Filter Media $7.99 Time Remaining: 18h 32m Buy It Now for only: $8.99 |
 CPR BIO BALE Biological Filter Media Medium White $6.49 Time Remaining: 14d 4h 24m Buy It Now for only: $6.49 |
 Fish Tank Ceramic Rings Biological Filter Media and 30 Bio Balls For Filtration $14.99 Time Remaining: 13d 2h 59m Buy It Now for only: $14.99 |
 Fish Tank Ceramic Biological Filter Media $13.98 Time Remaining: 13d 15h 55m Buy It Now for only: $13.98 |
 BIO FIBER BIOLOGICAL FILTER BLUE FRESH orSALT WATER $3.75 Time Remaining: 1d 7h 46m |
 CPR CR900 WET DRY BIOLOGICAL FILTER 125 gallon tank Made in USA $155.00 Time Remaining: 14d 12h 3m Buy It Now for only: $155.00 |
 Fluval G Nodes Biological Filter Media $17.12 Time Remaining: 23d 12h 2m Buy It Now for only: $17.12 |
 BIO FIBER BIOLOGICAL FILTER BLACK FRESH orSALT WATER $3.75 Time Remaining: 1d 7h 46m |
 Eheim 5 Liter Substrat Pro Biological Filter Media $69.97 Time Remaining: 18d 13h 6m Buy It Now for only: $69.97 |
 Fish Mate Pressurized Biological Pond Filter with Powerclenz 3000 Gallon Pond $187.99 Time Remaining: 26d 23h 5m Buy It Now for only: $187.99 |
 Duetto 100 Biological Filter Pad Sponge DJ 100 6 Pack $6.95 Time Remaining: 3d 16h 22m Buy It Now for only: $6.95 |
 Bio Balls 150ct Biological Media For Aquarium Filters 1 Bio Balls No Box J2 $15.00 Time Remaining: 1d 15h 28m |
 Aquarium Black Weighted Base Biological Sponge Corner Filter $5.98 Time Remaining: 21d 23h 4m Buy It Now for only: $5.98 |
 Eheim Liberty Coarse Blue Biological Filter Media 1 pk $3.20 Time Remaining: 11h 22m Buy It Now for only: $3.20 |
 Biological Filter Sponge Aquarium White Three Layers $5.72 Time Remaining: 29d 2h Buy It Now for only: $5.72 |
 Biological Filter Sponge Aquarium White Three Layers $5.72 Time Remaining: 12h 50m |
 Fish Tank Plastic 32mm Dia Biological Ball Filter 5 Pcs $3.75 Time Remaining: 23d 14h 46m Buy It Now for only: $3.75 |
 Duetto 50 Biological Filter Pad Sponge DJ 50 20 Pack $5.95 Time Remaining: 3d 16h 19m Buy It Now for only: $5.95 |
 10 x Fish Tank Plastic 26mm Dia Biological Ball Filters $4.15 Time Remaining: 18h 34m |
 Hagen BioMax Biological Filter Media 115 oz $17.49 Time Remaining: 6d 2h Buy It Now for only: $17.49 |
 Hagen Fluval 306 406 U2U3U4 Underwater Filter Biological Media BioMax Rings 6oz $6.95 Time Remaining: 27d 4m Buy It Now for only: $6.95 |
 Bio Fiber Biological Filter Fresh or Salt Water Durable Bonded Fiber Materail $3.75 Time Remaining: 6d 12h 56m Buy It Now for only: $3.75 |
 Fish Tank Plastic 32mm Dia Biological Ball Filter 5 Pcs $4.25 Time Remaining: 4d 1h 28m |
 24 Duetto 100 Biological Filters Pad Sponge DJ 100 $12.95 Time Remaining: 19d 7h 8m Buy It Now for only: $12.95 |
 3 PK Hagen AquaClear Bio Max Mini 20 Biological Filter $7.99 Time Remaining: 25d 23h 18m Buy It Now for only: $7.99 |
 Bio Fiber Biological Filter Fresh or Salt Water Durable Bonded Fiber Materail $3.75 Time Remaining: 4d 9h 10m |
 OCEAN FREE CERAMIC BIO BALL BIOLOGICAL FILTER MEDIA $6.95 Time Remaining: 26d 12h 23m Buy It Now for only: $6.95 |
 15 Duetto 100 Biological Filters Pad Sponge DJ 100 $9.95 Time Remaining: 3d 16h 23m Buy It Now for only: $9.95 |
 Marineland Duetto Biological Filter Pad Fits Duetto 50 $5.89 Time Remaining: 10d 9h 48m Buy It Now for only: $5.89 |
 Fish Tank Aquarium Biological Bio Ball Filter 76mm Diameter $4.98 Time Remaining: 1d 1h 58m |
 AquaClear 20 Mechanical Biological Filter Foam A 598 $8.65 Time Remaining: 18d 7h 11m Buy It Now for only: $8.65 |
 Savio LivingPond Waterfall Pond Filter Biological with 22 Weir 5000 Gal Ponds $429.99 Time Remaining: 12d 3h 31m Buy It Now for only: $429.99 |
 20 Pcs Aquarium Tank Filter Black 18mm Biological Bio Balls $4.78 Time Remaining: 16h 6m |
 AquaClear 30 Mechanical Biological Filter Foam A 605 $8.99 Time Remaining: 18d 6h 41m Buy It Now for only: $8.99 |
 AquaClear 50 Mechanical Biological Filter Foam A 613 $9.52 Time Remaining: 17d 7h 4m Buy It Now for only: $9.52 |
 Ehfi Substrat Pro Biological Filter Media Eheim 1L $19.95 Time Remaining: 14d 8h 34m Buy It Now for only: $19.95 |
 Duetto Biological Filter Pad fits duetto 50 $0.99 Time Remaining: 4d 8h 56m Buy It Now for only: $2.99 |
 Stress Zyme Establish Biological Aquarium Filter 16 oz $10.10 Time Remaining: 25d 13h 54m Buy It Now for only: $10.10 |
 Seachem Matrix Bio Media 500ml Biological Filter Media $5.87 Time Remaining: 11h 23m Buy It Now for only: $5.87 |
 Fish Tank Ceramic Biological Filter Media and Bio Balls In Zip Net Bag $14.95 Time Remaining: 13d 16h Buy It Now for only: $14.95 |
 Aquarium Black Weighted Base Biological Sponge Corner Filter $6.56 Time Remaining: 4d 1h 42m |
 Black Weighted Base Biological Sponge Corner Filter for Aquarium $7.27 Time Remaining: 22d 7h 9m Buy It Now for only: $7.27 |
 AquaClear 70 Mechanical Biological Filter Foam A 1396 $13.98 Time Remaining: 18d 6h 30m Buy It Now for only: $13.98 |
 Fish Tank Plastic 32mm Dia Biological Ball Filter 5 Pcs $3.76 Time Remaining: 4d 7h 38m |
 Lifegard Aquatics Fluidized Biological Aquarium filter $49.99 Time Remaining: 26d 14h 5m Buy It Now for only: $49.99 |
 API StressZyme Biological Filter Booster 64oz treats 3786 gal by Mars Fishcare $32.19 Time Remaining: 14d 8h 1m Buy It Now for only: $32.19 |
 316x 13 Pond Filter Biological Media bag 2mm $8.99 Time Remaining: 10d 17h 46m Buy It Now for only: $8.99 |
 Aquarium Tank Plastic Base Filtration Biological Sponge Filter $14.57 Time Remaining: 4d 6h 7m |
 Whisper In Tank filter 20i by Tetra a mechanical chemical biological filter $14.75 Time Remaining: 22d 12h 25m Buy It Now for only: $14.75 |
 20 Pcs Aquarium Tank Filter Black 18mm Biological Bio Balls $5.77 Time Remaining: 17d 9h 51m Buy It Now for only: $5.77 |
 Aquarium Tank Plastic Base Filtration Biological Sponge Filter $12.10 Time Remaining: 4d 11h 33m |
 Fish Tank Aquarium Biological Bio Ball Filter 76mm Diameter $4.40 Time Remaining: 24d 15h 14m Buy It Now for only: $4.40 |
 BIO FIBER BIOLOGICAL Filter Fresh or Salt Water Durable Poly Fiber Materail $3.75 Time Remaining: 6d 13h 26m Buy It Now for only: $3.75 |
 Aquarium Tank Weighted Base Biological Sponge Filter Black $11.34 Time Remaining: 3d 4h 42m Buy It Now for only: $11.34 |
 Aquarium or Pond Laguna Biospheres Biological Filter Media 120 Spheres $9.99 Time Remaining: 1d 12h 24m |
 Pump Biological Mechanical Filter 750 Gallon Ponds NIB $15.99 Time Remaining: 28d 15h 26m Buy It Now for only: $15.99 |
 Aquarium Black Weighted Base Biological Sponge Corner Filter $5.96 Time Remaining: 20d 2h 32m Buy It Now for only: $5.96 |
 20 Pcs Aquarium Tank Filter Black 18mm Biological Bio Balls $8.48 Time Remaining: 4d 9h 30m |
 Seachem Matrix Bio Media 1 Liter Biological Filter Media $10.57 Time Remaining: 11h 17m Buy It Now for only: $10.57 |
 20 Pcs Aquarium Tank Filter Black 18mm Biological Bio Balls $4.81 Time Remaining: 21d 7h 29m Buy It Now for only: $4.81 |
 Biological Filter Sponge Aquarium White Three Layers $5.72 Time Remaining: 18d 4h 44m Buy It Now for only: $5.72 |
 New 2831 Double Sponge Biological Filter for Shrimp and Fry CRS RCS $7.99 Time Remaining: 4d 13h 58m Buy It Now for only: $8.99 |
 2x SPONGE FILTER 5gal pump air Biological Media fish $7.99 Time Remaining: 27d 23h 35m Buy It Now for only: $7.99 |
 SPONGE FILTER 150gal pump air Biological Media fish $21.50 Time Remaining: 27d 22h 12m Buy It Now for only: $21.50 |
 Ehfi Substrat Biological Canister Filter Media Eheim 1L $19.95 Time Remaining: 14d 8h 34m Buy It Now for only: $19.95 |
 Biological chemical sponge filter Aquarium Water Filter $2.76 (10 Bids) Time Remaining: 2d 4h 23m |
 3 PK Hagen AquaClear Bio Max 300 70 Biological Filter $15.99 Time Remaining: 8d 11h 20m Buy It Now for only: $15.99 |
 sera Siporax Biological Aquarium Filter Media10L Bucket $139.49 Time Remaining: 27d 23h 52m Buy It Now for only: $139.49 |
 Aquarium Tank Weighted Base Biological Sponge Filter Black $11.07 Time Remaining: 20h 38m |
 Duetto multi filter biological filter tank refill DJ 50 $7.99 Time Remaining: 2h 48m Buy It Now for only: $7.99 |
 Biological Grid for Aqueon Quiet Flow 55 75 Aquarium Filter $9.99 Time Remaining: 8d 10h 48m Buy It Now for only: $9.99 |
 Weighted Base Biological Sponge Filter Black for Tank Aquarium $12.93 Time Remaining: 7d 9h 7m Buy It Now for only: $12.93 |
 Aquarium Weighted Base Biological 10 Layer Sponge Corner Filter $20.90 Time Remaining: 4d 41m |
 Pentair Lifegard Bio Mate Solid Biological Filter Media 1 1 2 $9.99 Time Remaining: 7d 1h 44m Buy It Now for only: $9.99 |
 20 Pcs Aquarium Tank Filter Black 18mm Biological Bio Balls $4.75 Time Remaining: 10d 14h 34m Buy It Now for only: $4.75 |
 Black Weighted Base Biological Sponge Corner Filter for Aquarium $7.30 Time Remaining: 4d 9h 12m |
 Fluval C4 Biological Trickle Chamber w Bio Screen for Aquarium Filter by Hagen $14.99 Time Remaining: 26d 4h 33m Buy It Now for only: $14.99 |
 Fish Tank Aquarium Biological Bio Ball Filter 76mm Diameter $4.37 Time Remaining: 13d 14h 41m Buy It Now for only: $4.37 |
 Aquarium Black Weighted Base Biological Sponge Corner Filter $6.33 Time Remaining: 22d 33m Buy It Now for only: $6.33 |
 Weighted Base Biological Sponge Filter Black for Tank Aquarium $12.67 Time Remaining: 4d 5h 28m |
 Aquarium Tank Plastic Base Filtration Biological Sponge Filter $12.68 Time Remaining: 14d 17h 42m Buy It Now for only: $12.68 |
 20 Pcs Aquarium Tank Filter Black 18mm Biological Bio Balls $8.49 Time Remaining: 10d 18h 34m Buy It Now for only: $8.49 |
 Black Weighted Base Biological Sponge Corner Filter for Aquarium $7.27 Time Remaining: 4d 11h 6m |
 Aquarium Black Weighted Base Biological Sponge Corner Filter $6.53 Time Remaining: 19d 11h 31m Buy It Now for only: $6.53 |
 Black Weighted Base Biological Sponge Corner Filter for Aquarium $7.52 Time Remaining: 16d 2h 12m Buy It Now for only: $7.52 |
 Aquarium Tank Plastic Base Filtration Biological Sponge Filter $12.90 Time Remaining: 7d 22h 1m Buy It Now for only: $12.90 |
 Weighted Base Biological Sponge Filter Black for Tank Aquarium $12.05 Time Remaining: 4d 5h 49m |
 Marineland Duetto Biological Filter for DJ100 $1.94 Time Remaining: 25d 59m Buy It Now for only: $1.94 |
 Ehfi Substrat Pro Biological Filter Media Eheim 2L $34.95 Time Remaining: 14d 8h 34m Buy It Now for only: $34.95 |
Biological Filter
Koi Pond: Biological Filters
Contrary to common belief, biological filters do not process or filter the solid waste of fish in your koi pond. They continue to build up and putrefy, creating a breeding ground for harmful species of heterotrophic bacteria which are pathogenic to koi fish. As stated, the biological filtration process utilizes Nitrosomonas bacteria to break down ammonia into nitrite and nitrobacter, further converting nitrites into nitrates, which is less harmful to koi fish.
Plants now utilize the nitrate and phosphate for fertilizer; if you have not provided an adequate ratio of water plants to koi fish, “hard” algae (growing on rocks and koi pond walls) and “free- floating” algae use nitrate and phosphate to reproduce. The key to preventing this condition, called “algae bloom,” is to provide enough nonsoil bearing plants such as water lettuce and hyacinths to compete for the nitrate and phosphate. Since these two plants are tropical and can only survive in warm climates, hardier varieties such as Elodea and Anacharis will perform well in cold climates. These plants are commonly used in bio-filter ponds.
A bio-filter pond is used in conjunction with shallow koi ponds with small populations of koi fish. It will also eliminate the need for a mechanical bio-filter and a second pump to operate it. The bio-filter pond is located higher than the main pond for two reasons. It prevents the koi fish from eating the plants and it allows the water from the waterfall to be filtered as it passes through the plants prior to spilling into the lower koi pond.
An adequate ratio of plant cover for the koi pond’s surface is approximately 20 to 30 percent. This is a basic rule of thumb and many factors can change this equation. For example: koi fish population, water temperature, and debris accumulating from leaves or over-feeding the koi fish. I have said many times that the Koi Pond is the koi’s living room, dining room and toilet.
If you do not have a bio-filter, that could explain why your koi pond is a tad green, stinky, or cloudy, and why your finned family is gulping air on the surface. Trust me. That will not be for long. Fish gulping air to survive would be like you -- in an attempt to avoid breathing poisoned air -- gulping water to survive. I have a do-it-yourself simple instruction sheet with diagrams, for building your own bio-filter using $25-$35 worth of parts from any home improvement store. Also includes a shopping list of necessary items. download free (no sign-in) no obligation... http://www.askdoughoover.com/
Happy koi, peace and joy.
About the Author
Can i use a biological filter for a Salt water Fish Tank?
I Have A 30 Gallon.... If The Answer Is No Please Tell Me What Type Of Filter Can I Use For a 30 Gallo Tank! What Else Is Recommended????
yes you can use a biological filter, because its an essential place for beneficial bacteria to grow and copepods to thrive. i use a canister filter with a biological tier that contains bio-balls that contains groups of copepods and brine shrimp that were supposed to be eaten. for saltwater aquarium its better to use sumps rather then a canister or a power filter. its very important to have a biological section in a filter or sump so you do have those beneficial bacteria that break down ammonia to nitrites to nitrates, keeping the aquarium prestine and no problems.
XTREME BIO FILTERS- Dr. ANNE HUGHES/ Happy Pond Owner