piggybacking filters? - The Planted Tank Forum

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 17 (permalink) Old 11-28-2012, 04:59 PM Thread Starter
Planted Tank Obsessed
 
dj2606's Avatar
 
Join Date: Mar 2009
Location: Richmond, VA
Posts: 475
piggybacking filters?

does linking multiple filters increase the gph/flow?
dj2606 is offline  
Sponsored Links
Advertisement
 
post #2 of 17 (permalink) Old 11-28-2012, 08:43 PM
Planted Tank Guru
 
lochaber's Avatar
 
Join Date: Jan 2012
Location: Oakland, CA
Posts: 2,318
I wouldn't feed the outflow of one canister filter into the inflow of another, if that's what you are talking about.

But you could easily run multiple filters on the same tank if you feel that you need extra filtration.

I'm not certain about this, but you might even be able to get away with using the same intake and outflow, just split it so the two filters run in parallel.

I think it would be safer (and probably simpler plumbing) to run them separately.
lochaber is offline  
post #3 of 17 (permalink) Old 11-28-2012, 09:27 PM
Planted Tank Guru
 
PlantedRich's Avatar
 
Join Date: Jul 2010
Location: Pflugerville, Tx
Posts: 7,876
If you joined two canister filters of the same type, I would guess that the flow might be slightly higher at the start. But that doesn't mean that it would be worthwhile. One can get far more flow by using the two as separate filters. One of the big downsides to joining them would be the way the first filter would clog sooner. Once the media in that filter is stopped up, any gain would be totally shut down.
Since filters are designed by people who do this full time for companies who do a lot of research on what works, I see very few people who can actually improve the results and can prove it with actual measurements.

As a person with a very strong DIY gene, I'm often tempted to try to improve things but filters are not a place where I mess with the design much. I find far more untested theory on the INTERNET than I find actual proven results with testing to back it.
PlantedRich is online now  
post #4 of 17 (permalink) Old 11-29-2012, 04:36 AM Thread Starter
Planted Tank Obsessed
 
dj2606's Avatar
 
Join Date: Mar 2009
Location: Richmond, VA
Posts: 475
My ultimate goal is to get more flow. However, I don't want any extra equipment in the tank i.e. powerheads, filter pipes. I only want 1 set of filter pipes.


Quote:
Originally Posted by lochaber View Post
I wouldn't feed the outflow of one canister filter into the inflow of another, if that's what you are talking about.

But you could easily run multiple filters on the same tank if you feel that you need extra filtration.

I'm not certain about this, but you might even be able to get away with using the same intake and outflow, just split it so the two filters run in parallel.

I think it would be safer (and probably simpler plumbing) to run them separately.
Would I need to worry about one filter pulling or pushing more?




Anyone running multiple filters wanna give some experiences....?

How are you plumbing them?
dj2606 is offline  
post #5 of 17 (permalink) Old 11-29-2012, 04:51 AM
Planted Member
 
Join Date: Jan 2012
Location: Dallas, Texas
Posts: 196
Send a message via MSN to Exie Send a message via Skype™ to Exie
Just get a twice-the-size you need input, and Y it off to two separate canisters once its out of the tank. Similar for the output - Y it off at twice the size.
Exie is offline  
post #6 of 17 (permalink) Old 11-29-2012, 06:25 AM
Planted Tank Guru
 
lochaber's Avatar
 
Join Date: Jan 2012
Location: Oakland, CA
Posts: 2,318
Quote:
Originally Posted by dj2606 View Post
My ultimate goal is to get more flow. However, I don't want any extra equipment in the tank i.e. powerheads, filter pipes. I only want 1 set of filter pipes.




Would I need to worry about one filter pulling or pushing more?




Anyone running multiple filters wanna give some experiences....?

How are you plumbing them?
I haven't run multiples, but if the flow rates are at all similar, I would imagine that a Y from the intake and a Y from the outflow would suffice, as long as it was big enough to easily handle the combined flow rate.

Out of curiosity, what filters are you considering for this, and what's your tank?

I think that with a planted tank, it's generally a safe bet to undershoot the recommended GpH filtration rate, as the plants are going to be handling a lot of the filtration needs.
lochaber is offline  
post #7 of 17 (permalink) Old 11-29-2012, 02:12 PM
Planted Tank Guru
 
PlantedRich's Avatar
 
Join Date: Jul 2010
Location: Pflugerville, Tx
Posts: 7,876
For two filters inline to pass more water, it would require the impellers to turn faster. In this case the impeller is turning in time with the 60 cycle AC current. Making it easier for it to turn will not greatly effect the rotation. The second impeller in line will really try to slow any increase in speed rather than turn faster.
PlantedRich is online now  
post #8 of 17 (permalink) Old 11-29-2012, 05:18 PM
Algae Grower
 
Join Date: Mar 2007
Location: LBC
Posts: 51
I have too much equipment(and to increase water circulation/flow throughout the whole tank) so I plan on doing this as well.

Okay, can't you run one intake pipe and a Y to connect to both canister then run both output to a Y with a slightly larger hose to one output?
snakebite is offline  
post #9 of 17 (permalink) Old 11-29-2012, 06:04 PM
Planted Tank Guru
 
Join Date: Jan 2010
Location: Contra Costa CA
Posts: 11,721
Quote:
Okay, can't you run one intake pipe and a Y to connect to both canister then run both output to a Y with a slightly larger hose to one output?
Yes.
Upsize the part of the plumbing where the flow is combined.
Example: If each filter used 1/2" tubing go with at least 3/4" for the inlet and outlet.
Diana is offline  
post #10 of 17 (permalink) Old 11-30-2012, 01:35 AM
Algae Grower
 
Dangermouse's Avatar
 
Join Date: Jan 2005
Location: Godzone (New Zealand)
Posts: 20
FWIW, I've run two canister filters inline for years without a problem. My reasoning was purely speed of maintainence; I use the first canister (Fluval 104)essentially as a prefilter (it's packed with floss) and the second (Eheim 2224) purely as a bio-filter. I can change out the Fluval in five minutes as I can just whip out and discard all of the medium and completely replace with fresh without any concern for bacterial population or biological filtration (I use polyester cushion stuffing so it's extremely cheap to just discard). The second filter gets cleaned maybe once or twice a year as it never gets particularly dirty. Works a treat. Because there's no fussing about with buckets and cleaning out filter media in tank water, I find I tend service the Fluval very regularly and rapidly which keeps the tanks looking great.

In terms of flow, both filters have similar outputs, I think there's a net increase in pressure but not total output...



Dangermouse is offline  
post #11 of 17 (permalink) Old 11-30-2012, 02:06 AM
Moderator
 
Darkblade48's Avatar
 
Join Date: Jan 2008
Location: Toronto/Singapore
Posts: 10,297
Quote:
Originally Posted by Dangermouse View Post
[Picture removed for brevity]

This comment is off topic, but the cat is adorable.

Anthony

A Primer to Pressurized CO2 and A Primer to Planted Tanks
Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
Darkblade48 is online now  
post #12 of 17 (permalink) Old 11-30-2012, 02:54 AM
Wannabe Guru
 
nokturnalkid's Avatar
 
Join Date: Apr 2007
Location: HI, but Pueblo, CO for now
Posts: 1,241
You could also just get an external pump with a higher gph and run that inline of your filter. Essentially, the cannister will just hold media and the external pump will do all the work.

Schuber Wright 6 gal
Mr. Aqua 11.4 g...coming soon
30gal Journal - RIP
nokturnalkid is offline  
post #13 of 17 (permalink) Old 11-30-2012, 03:20 AM
Planted Tank Enthusiast
 
james1542's Avatar
 
Join Date: Sep 2011
Location: WA
Posts: 506
Quote:
Originally Posted by Darkblade48 View Post
This comment is off topic, but the cat is adorable.
Lol thank you for pointing that out I missed it at first.

When I first saw this thread, the first thing that popped into my head was piggy backed power filters! Some one do it now!

If you want more filter capacity without more plumbing in the tank, you can just add a few RO type filters canisters in line with your canister filter.
james1542 is offline  
post #14 of 17 (permalink) Old 11-30-2012, 02:11 PM Thread Starter
Planted Tank Obsessed
 
dj2606's Avatar
 
Join Date: Mar 2009
Location: Richmond, VA
Posts: 475
Quote:
Originally Posted by james1542 View Post
Lol thank you for pointing that out I missed it at first.

When I first saw this thread, the first thing that popped into my head was piggy backed power filters! Some one do it now!

If you want more filter capacity without more plumbing in the tank, you can just add a few RO type filters canisters in line with your canister filter.

not looking for more filtration just flow. I only run a tray of bio rings and a purigen bag in another tray. I let the plants do most of the filtration.

Quote:
Originally Posted by Darkblade48 View Post
This comment is off topic, but the cat is adorable.
agreed =)
dj2606 is offline  
post #15 of 17 (permalink) Old 11-30-2012, 02:13 PM Thread Starter
Planted Tank Obsessed
 
dj2606's Avatar
 
Join Date: Mar 2009
Location: Richmond, VA
Posts: 475
I'm goin to run sunsun filters which are 3/4 to pvc then the output of the 3/4 pvc to 5/8. Same for the filter intake.
dj2606 is offline  
Reply

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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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