Welcome to Our Help Site

• Where can I buy Hydor products?
• Who is Ferplast?
• Why should I buy Hydor products on the Ferplast website?

• I have problems with the item I purchased, what can I do?

• How can I subscribe to the newsletter?
• How can I unsubscribe to the newsletter?

• How effective is the “Legal Guarantee”?
• What is the “Legal Guarantee”?

• How often should I change this media?
• What size pack do I need for my filter?

• How often should I change this media?
• What size pack do I need for my filter?

• Do you have any tips on the air line positioning?
• How do i position the Hydor bubble diffuser?
• What size aquarium is suitable for the Hydor Bubble air diffuser?

• Can I adjust my Crystal Filter to suit my Aquariums needs?
• Can I use the Crystal Filter as a power head to supply water flow to other devices such as a fluidiser?
• Can I Use the Crystal Filter Horizontally?
• How do I clean the Crystal Filter?
• What Fish can I keep when using a Crystal Filter?

• Can i use more than one heater inline?
• Do I need to turn the Heater OFF when I am doing a water change?

• Do I need to wash the Decorations before adding to the aquarium?

• Can I use the Pump on a Wave controller such as Hydor Smartwave?
• How do I choose the right size?
• My Koralia Evo Pump is Running in Reverse.
• There is No flow from My pump.

• Can I use the Pump on a Wave controller such as Hydor Smartwave?
• How do I choose the right size?
• My Koralia G3 pump is running in reverse.
• There is No flow from My pump.

• Can I use the Pump on a Wave controller such as Hydor Smartwave?
• How do I choose the right size?
• I have broken the Red Ball joint off at the back of the Pump, can I get a replacement?
• My Nano Koralia Pump is Running in Reverse.
• There is No flow from My pump.

• Can I program the pump to produce different flows throughout the day?
• Fault Finding : The Wifi Controller light is Blinking Blue? What does this mean?
• Fault Finding : The Wifi Controller light is Blinking Red & Green? What does this mean?
• Fault Finding : The Wifi Controller light is Blinking Red? What does this mean?
• Fault Finding : The Wifi Controller light is Blinking White? What does this mean?
• How can I load a preset program to my Koralia Wifi pump?
• How do I check that my Koralia WiFi device is updated to the most recent version?

See all articles in Koralia WiFi →

• How does the RGB LED mini spotlight work?
• How do I position the light onto the Hydor Bubble Show?
• Why should I use LED lights in the aquarium?

• How often should I change this media?
• What size pack do I need for my filter?

• Can I use different media to those included with my Prime filter?
• Can I Use Prime External Filter for Marine Aquariums?
• How do I gain access toclean the Impeller in my Prime filter?
• There is air coming from the outlet of the filter into the aquarium? What should I do?
• What Maintenance is required for the Prime Filter?

• How often should I change this media?
• What size pack do I need for my filter?

• How do I site the Smartlevel to get the best results?
• Is the Smartlevel sensor affected by Coralline Algae or limescale?
• My Water is always moving in the sump, how will this effect the Smartlevel sensor?
• What Safety Features does the Smartlevel have?
• What size pump should I use with Smart Level?
• Why has my Smartlevel allowed my aquarium to be overfilled?

• Can I use Smartwave with any pump?
• How do I position Smartwave?
• How many pumps can I connect to the Smartwave controller?
• What is the recommended setting for Smartwave?

• Do I need to turn the Heater OFF when I am doing a water change?
• Whats the best position to mount Hydor heaters? Can I use the Heater for Terrarium?

• Do I need to wash the Decorations before adding to the aquarium?

• Can I use Flo on any pump or outlet?
• Flo deflectors are suitable for use in freshwater aquariums?
• How do I fit Flo to my pump?
• What Maintenance is required for the Flo deflector?

• Are there any benefits of using an external thermostat with the Hydrokable?
• How is the Hydrokable attached to the base of the aquarium?
• What lengths are the Hydrokable available in?
• What Maintenance is required for the Hydrokable?
• What size Hydrokable heater do I need for my aquarium?

• Is the temperature probe ok in water?
• What Maintenance is required for the Hydroset?
• What size of heater can I control with Hydroset?
• What temperature can I set the Hydroset from/to?
• Where should I position the temperature probe?

• Can I use the Seltz D AC for applications other than aquatics?
• How is the pump fitted in a sump situation? How is the pump fitted in a surface or "dry" situation?
• What flow is available from the pump and what is meant by "Max Head"?
• What is the Maintenance schedule for Seltz D AC pumps?

• Can the Seltz D POND AC run more than one item? Such as an ornament and filter?
• How is the pump fitted in the pond? How is the pump fitted in a surface or "dry" situation?
• What flow is available from the pump and what is meant by "Max Head"?
• What is the Maintenance schedule for Seltz D POND AC series pumps?

• Can the Seltz D POND DC run more than one item? Such as an ornament and filter?
• How is the pump fitted in the pond? How is the pump fitted in a surface or "dry" situation?
• What flow is available from the pump and what is meant by "Max Head"?
• What is the Maintenance schedule for Seltz D POND DC series pumps?