Light dimmer to control powerhead? - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 02-26-2010, 10:59 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Jan 2010
Location: West Texas
Posts: 69
Light dimmer to control powerhead?

About a month ago I ordered a SEIO pump from Foster and Smith. I liked that one because it was adjustable. I showed up, and after getting it installed, I decided within a few seconds that it was unacceptably loud. I sent it back to F&S for an exchange for a Koralia 1. Those are on back order, so I opted to exchange for a Koralia 2 instead. It's a nice pump. It's quiet, looks to be great quality... however; that thing moves some water! My school of 10 black neon tetras seem to be able to do nothing swim for their lives to keep from being sucked into the back of that thing.
I"ve already spent too much on shipping to send it back again.
Is it possible to use a light switch dimmer (thyristor) to vary the 'power' to the Koalia pump? Any other ideas?

Also, Koralia makes different pumps for always-on, and pumps for wavemaker applications. The normal pumps are not meant to be turned on and off repeatedly... Can I put this on a timer and turn it on and off ONCE a day?
stripe157 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 02-26-2010, 11:47 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Jan 2010
Location: West Texas
Posts: 69
The dimmer thing isn't going to work. I just tried it. The impeller twitches some, but no water movement.
stripe157 is offline  
post #3 of 8 (permalink) Old 03-01-2010, 02:33 AM
Planted Tank Guru
 
DarkCobra's Avatar
 
PTrader: (5/100%)
Join Date: Jun 2004
Location: Baton Rouge, LA
Posts: 3,350
Yep.

Normal dimmers are made for resistive loads (like light bulbs), and usually fail to operate properly when connected to inductive loads (like motors).

There are some specialty "dimmers" made for inductive loads, like ceiling fan speed controls. But what I typically see in filters are synchronous AC motors; their speed is determined not by the power going through it, but by the frequency of the AC line. I know of no way to successfully modify their speed, restrict the power and they operate erratically or stop.

Best to solve this one by restricting or spreading the water flow.
DarkCobra is offline  
 
post #4 of 8 (permalink) Old 03-01-2010, 02:48 AM
Planted Tank Guru
 
OverStocked's Avatar
 
PTrader: (76/94%)
Join Date: May 2007
Location: SoDak
Posts: 10,732
Easy way to fix this...

either use a little mesh to clog up the intake, or some silicone allowed to cure fully. Just cover up a few slats at a time and see what you get. This will inevitably cause the early demise of your pump, though.
OverStocked is offline  
post #5 of 8 (permalink) Old 03-01-2010, 03:03 AM
Planted Tank Enthusiast
 
kyle3's Avatar
 
PTrader: (1/100%)
Join Date: May 2005
Location: Washburn, Wisconsin
Posts: 713
hmm that's a tricky problem.

could you use one of those "breeder" nets that have a plastic frame to keep your fish from getting sucked in? I'm afraid that would be terribly unattractive but what if you custom built one just slightly bigger than the korelia and used a black mesh fabric, might look a bit more unobtrusive. you much of a seamstress?

hope you find a good solution!

good luck-K

______________________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
kyle3 is offline  
post #6 of 8 (permalink) Old 03-01-2010, 06:34 PM
Are these real?
 
Wasserpest's Avatar
 
PTrader: (195/100%)
Join Date: Jun 2003
Location: Monterey, CA
Posts: 15,634
You could put the Koralia up in the Swap section to exchange for a smaller one (1 or even better Nano, depending on your tank size). I am sure there is someone out there who would like to trade up.

And yes, shouldn't be an issue turning the pump on and off once a day. Better solution would be to use a properly sized one and let it run all the time.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Wasserpest is offline  
post #7 of 8 (permalink) Old 03-02-2010, 02:23 AM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Jan 2010
Location: West Texas
Posts: 69
I was in the process of sewing up some filter pad to stick on the back of it, got halfway through and realized that this is not one of my talents.
I may be able to sell it a friend with a more 'appropriately' sized tank.
Oh by the way, Foster and Smith don't even have the koralia 1,2 listed anymore...
are they coming out with a new model I wonder?
stripe157 is offline  
post #8 of 8 (permalink) Old 03-02-2010, 02:28 AM
Planted Tank Guru
 
OverStocked's Avatar
 
PTrader: (76/94%)
Join Date: May 2007
Location: SoDak
Posts: 10,732
Quote:
Originally Posted by stripe157 View Post
I was in the process of sewing up some filter pad to stick on the back of it, got halfway through and realized that this is not one of my talents.
I may be able to sell it a friend with a more 'appropriately' sized tank.
Oh by the way, Foster and Smith don't even have the koralia 1,2 listed anymore...
are they coming out with a new model I wonder?
They are. It is advertised in TFH magazine as smaller.
OverStocked is offline  
Reply

Tags
None

Quick Reply
Message:
Options

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

Password:


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

Email Address:
OR

Log-in










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