Restricted flow on filter - The Planted Tank Forum
  • 1 Post By MrT.
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 07-09-2018, 12:39 AM Thread Starter
Algae Grower
PTrader: (0/0%)
Join Date: Jun 2018
Location: UK
Posts: 15
Restricted flow on filter

The tubes for my Eheim canister filter crimp slightly in certain places which restricts the flow of water. Are there any solutions to prevent this from happening? I'm sure I can't be the only one to experience this issue? How do you keep the tubes fully open and not bending in any areas?
john10001 is offline  
Sponsored Links
post #2 of 6 (permalink) Old 07-09-2018, 01:00 AM
Algae Grower
MrT.'s Avatar
PTrader: (0/0%)
Join Date: May 2018
Posts: 39
On one tank I stepped up to 3/4"(19mm) tubbing which is very stiff and doesn't crimp, and on another I swapped the tubbing out with PVC. Anyway you do it you're always going to have some residual loss of flow which is why I've joined the ranks of the 10x filter club.
Discusluv likes this.

MrT. is offline  
post #3 of 6 (permalink) Old 07-09-2018, 11:44 AM
Algae Grower
unclefred's Avatar
PTrader: (0/0%)
Join Date: Feb 2018
Location: Southern USA
Posts: 18
I have not used eheim brand hoses or filters however with clear vinyl (and green for that matter) I have solved it 2 ways:
1. Most effective, replace with a hose that's not kinked to begin with.
2. Do at your own risk of personal and pet safety: Place the kink in very hot water and manipulate the bend or in extreme cases blow in the hose to expand the kink. Be careful, there is much room for error and self inflicted wounds with this method.

Another method, you could cut out the kink and put in a hose splice with clamps.
unclefred is offline  
post #4 of 6 (permalink) Old 07-09-2018, 02:45 PM
Planted Tank Guru
PlantedRich's Avatar
PTrader: (2/100%)
Join Date: Jul 2010
Location: United States
Posts: 12,031
Hard to say what is needed in any specific setup without seeing the layout but there may be some general help. One is cutting the tubing to avoid kinks! sounds pretty simple but there are times when we shoot ourself by avoiding cutting.
Using the Eheim stock tubing can get better results than that found at many hardwares as it is designed to not kink.
But if those fail, adding fittings can cut the kinking but at the expense of some loss of flow due to the fittings themselves. When we add a fitting inside a tube, we automatically reduce the inside opening and that reduces flow.
I find arranging large sweeping curves to work better when I do not want to cut or add fittings. In some cases, I know I will be moving this filter to a spot where I want longer tubing so I keep the long stuff from kinking by strapping it in a curve.
PlantedRich is online now  
post #5 of 6 (permalink) Old 07-09-2018, 03:14 PM
Wannabe Guru
PTrader: (2/100%)
Join Date: Jun 2005
Location: Medina, Ohio
Posts: 1,444
Post the filter model and if you can, a pic of the where/how the hoses are crimped.

Most times the crimp/kink is where the hoses come over the rim of the tank.

Eheim Pimpette #270
Eheim Pro II 2028; Classics Series -2215, 2217, 2260, 2262; Pro 2229 Wet/Dry
deeda is offline  
post #6 of 6 (permalink) Old 07-09-2018, 11:55 PM
Planted Tank Guru
Jeff5614's Avatar
PTrader: (52/100%)
Join Date: Dec 2005
Location: TN
Posts: 3,604
Eheim makes a rigid elbow connector to prevent kinks.
Jeff5614 is offline  


Quick Reply

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome