Fluval 405 issues

Aqua Hero

Member
Joined
8 May 2015
Messages
272
before i resort to buying a whole new filter i wanted to know if i could fix the problem with my 405.

The problem is that the flow will start strong for like a day and then become incredibly weak. its a struggle to prim it because the filter doesnt push the water up fast enough. is this an impeller issue or is it something to do with the motor?
 

billy boy

Member
Joined
22 Sep 2008
Messages
273
Location
wick. scotland
Have you taken the impeller out and cleaned/inspected it? Do you have a lot of media in the canister and have you cleaned the hoses out recently.

As from for priming, I got round that by filling the filter up with tank water after maintenance and shaking it gently to get rid of any air and reconnected it back and of it would go! Worked on my 305
 

Aqua Hero

Member
Joined
8 May 2015
Messages
272
Have you taken the impeller out and cleaned/inspected it? Do you have a lot of media in the canister and have you cleaned the hoses out recently.

As from for priming, I got round that by filling the filter up with tank water after maintenance and shaking it gently to get rid of any air and reconnected it back and of it would go! Worked on my 305
i did all of that and it didnt work
 

billy boy

Member
Joined
22 Sep 2008
Messages
273
Location
wick. scotland
Sounds like your motor is over heating and on the way out, I would still try running it with no media to see how it performs. Is the motor hot when its running?
 

Aqua Hero

Member
Joined
8 May 2015
Messages
272
No the motor is not over heating at all. Feels normal

Sent from my D2303 using Tapatalk
 

ian_m

Global Moderator
Staff member
Joined
25 Jan 2012
Messages
5,209
Location
Eastleigh
Most of the filters we use have a magnetised impellor, which over time (and especially after a run dry over heat), lose their magnetism. Replacing the impellor will usually fix the flow rate.
 

Similar threads

Top