Q & A

Can Osaka filters be applied in a gravity fed set-up?
Osaka filters can be applied both in a gravity fed set-up and a pump fed set-up unless mentioned otherwise. The reason Osaka filters can be used in both ways is that a reducer 110x50mm is included in the package. This reducer can be mounted on both the entrance and the exit of the filter.

Can the filter be placed below ground level?
The filter can be placed below ground level as long as it’s not positioned below the water level in the pond. Filtering systems below ground level should always be used in a gravity fed set-up!

Should I use a larger filter when my pond is inhabited by a large number of fish or koi?
Yes, a pond with a large number of fish requires more feeding. Food causes nitrate and nitrite in the water which in large quantities can cause harm to your fish and koi. To ensure a good water quality it is vital the surplus nitrate and nitrite gets filtered out of the water. More fish and koi means more nitrate and nitrate, requiring a larger filter to keep the pond in biological balance.


Do I need a pressure pump for an Osaka chamber filter?
No, a pressure pump is not required because an Osaka chamber filter works optimally with an ECO pump. A chamber filter requires a very low pressure causing it to be compatible with almost any pump!

Can an Osaka chamber filter be installed outside?
Yes, an Osaka chamber filter can be placed outside. Osaka chamber filters are weather resistant because of the high quality polyester housing. The special coating protects the filter against UV radiation guaranteeing a long lifetime. Osaka chamber filters come with a 5 year warranty!

 Can the filter withstand ground frost?
Yes, the filter can keep working during ground frost. The only thing you need to do is ensure the water pipes and hoses don’t freeze. May you need to turn off the system for a reason, make sure all water has been removed from the filter.

Where and how can I order Osaka products?
Osaka products are available from any Osaka Dealer; please look up your local dealer.

How long does the warrantee on my Osaka filter last?
Osaka chamber filters come with a 5 years warrantee on fabricating errors!

What are the shipping costs for an Osaka chamber filter?
The Osaka import group delivers anywhere quickly and for free!
For shippingcost of export orders please contact us at export@osakaimportgroup.com
You will get awnser in 24 hours! Please feel free to contact us!


My pond is green, what can I do about it?
A green pond is often caused by two kinds of algae called the blanket weed and the green algae. Both species require a different treatment. To get rid of blanket weed you should use blanket weed powder. This powder breaks down the blanket weed in a biological way. Keep in mind blanket weed is a plant which causes fish to get tangled, to ensure safety of your fish blanket weed should be removed from the pond.
Green algae in the contrary produce a green glow in your pond decreasing the transparency of the water. The only way to get rid of these algae is by using a UVC. Green algae cannot be filtered from the water. A UVC is a blue UV lamp which runs on electricity which kills the one-celled green algae, allowing an Osaka filtering system to remove them from the water.

How do I know if the quality of the water in my pond is right?
The only way to know if the quality of the water is perfect is measuring it. The values that matter are the PH, GH and KH levels and the amount of nitrate, nitrite and ammonia in the water. There are multiple tests and strips available allowing you to measure the quality of the water in your pond.
The ideal levels for pond water are: 
pH-value: 7- 8
GH-value: 8- 12
KH-value: 5- 12
Ammonia (NH3) < 0,15 mg/l
Nitrite (NO2) < 0,15 mg/l
Nitrate (NO3) < 0,50 mg/l
Oxygen(O2): 60%- 100%

Please keep in mind a good water quality is the primary requirement for a healthy pond. Bad water quality is the #1 cause for sick fish and other problems in any pond. Always test the quality of the water prior to acting. Always ensure the quality of the water is acceptable prior to treating sick fish and attempting to solve other problems in the pond.

What do these values mean?
pH level:
 pH is a measure of the acidity of the water, solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are basic. 
GH level: The GH level is a measure for the amount of minerals in the water. Both fish and plants need minerals. Make sure your pond has a GH level of at least 8, the optimal GH level is 12.
KH level: The KH level is an indicator for the amount of carbonate and bicarbonate ions in the water. When the KH level is to low, the pH value may show fluctuations. As long as the KH level is at least 5 the pH level of the water remains stable. The optimal KH level is 8.
The amount of NH3: Ammonia (NH3) is very dangerous causing disease and the death of fish. High levels of ammonia appear in new ponds, when there are problems with the filter or when the pond is overpopulated with fish. In case of disease and dead fish measure the ammonia level on a daily base. 
When the ammonia level is higher than 0,15 mg/l immediately refresh 50% of the water and stop feeding your fish. The following days 25% of the water should be refreshed until ammonia levels return to normal. Secondly adding zeolite to your filter immediately absorbs ammonia.
The amount of NO2: Nitrite (NO2) is highly toxic and dangerous for your fish. Nitrite levels should never exceed 0,15 mg/l. When the nitrite level is higher than 0,15mg/l  immediately refresh 50% of the water. The following days 25% of the water should be refreshed until nitrite levels return to normal. Also add PSB bacteria to the water and stop feeding the fish.
The amount of NO3: Nitrate (NO3) is a useful nutrient which is beneficial for both plants and algae. Heightened nitrate levels occur in ponds with large numbers of fish. Nitrate levels below 50 mg/l are optimal. When nitrate levels rise above 100mg/l partially refresh the water.
The amount of O2: Oxygen (O2) is essential for a healthy pond. Inadequate O2 levels are caused by to many living or dead algae, high temperatures, large numbers of fish, treating fish with medicines and bad water circulation. An oxygen level of at least 60% is the absolute minimum for a healthy living environment for your fish. In case oxygen levels drop below 60% a large amount of water should immediately be refreshed. The second step is installing an air pump or improving water circulation.

Overview of the optimal values:
pH-value: 7- 8
GH-value: 8- 12
KH-value: 5- 12
Ammonia (NH3) < 0,15 mg/l
Nitrite (NO2) < 0,15 mg/l
Nitrate (NO3) < 0,50 mg/l
Oxygen(O2): 60%- 100%

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