Air Pump Recommendation for Nexus
You can increase the biological capacity of your nexus by adding additional K+Media into the outer chamber.You will however need to ensure that you have the correct size of air pump to enable the K+Media to move sufficiently. See below fo recommended size of air pump.
Nexus 220+
The following Evolution Aqua air pumps are recommended for use with the nexus 220+. Our recommendations are based on the amount of K+Media that is in the outer chamber.
| Total amound of K+Media in the outer chamber | Recommended Evolution Aqua Air Pump |
| 50 Litres (as supplied) - 75 Litres | Air Pump 75 |
| 75 - 100 Litres | Air Pump 95 |
| 100 - 150 Litres | Air Pump 130 |
Nexus 320+
The following Evolution Aqua air pumps are recommended for use with the nexus 320+. Our recommendations are based on the amount of K+Media that is in the outer chamber.
| Total amound of K+Media in the outer chamber | Recommended Evolution Aqua Air Pump |
| 100 Litres (as supplied) | Air Pump 95 |
| 100 - 150 Litres | Air Pump 130 |
| 150 - 300 Litres | Air Pump 150 |
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