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what size of the tank you intend to experiment? i suppose the flowrate will greatly affected.
Hello fellow friends,
I plan to use Eheim 2028 and 2224 in series as filter. 2028 as mechanical filter and 2224 as pure bio filter. In series means the output of 2028 goes straight into the 2224 and the output of 2224 back to the tank. I intend to swith OFF the electricity of 2224, take away the impellar.
Is 2028 strong enuf to push the water into 2224 and back into the tank?
Any brudder or sister here tried it before? Will this put a strain on 2028 and spoil it faster?
Thanks for the advice!!
cheers
what size of the tank you intend to experiment? i suppose the flowrate will greatly affected.
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Hi, would it be easy to attach the output of Eheim 2028 to the overhead fitler (those stackable type) and let the water drip down naturally..Originally Posted by jothedragon
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you should put the 2224 before 2028. it is advisable to control flowrate by throttling the inlet valve and not the outlet valve. try to impede the outflow from your 2028.
thomas liew
Sorry to interrupt, but this is bad advise. All manufacturers I know (first and foremost Eheim) recommend throttling the outlet, i.e. the pressure side of the pump. Throttling the inlet may cause the motor to stumble.
yes. you are right.
should throttle the outlet.
sorry for the mistake and thanks for pointing out.
thomas liew
I cannot remember on which forum I have followed a similar discussion. It was a long debate on this issue of using two canister filters the first one pumping the water through the second. I do remember someone has even tried to match the flowrates in an attempt to use the sencong filter powered up too but finally failed.
I am using two canister filters on a large aquarium too. They are rated 1200l/h respectively 700l/h and they run on a 330liters aquarium. I filled the higher rated one with more bio filtering media while the smaller one has more mechanical filter media. At a certain point I wanted to somehow run the outlet pipe of the smaller canister _in_the_aquarium_ very close to the other canister's inlet. I thought that this way the water entering into the larger filter was cleaner thus preventing the bio media to clog easy. I finally gave up on this idea and the filters run now on separate corners but still loaded with the same type of media.
Last edited by ForestG; 21st Aug 2006 at 03:51.
Hi friends...
thanks for the advices...
However, I dont quite understand why do i need to match the flowrate or reduce the output of 2028. I intend to SWITCH OFF the the electricity supply for the smaller filter,2224.
So, my question is, by letting the 2028 running at full strength, will it have enuf strength to push the 2224 water back to the aquarium?
Tawauboy suggested to put 2224 in front of 2028 instead of at the back. This is to say 2028 suck the water from 2224 instead. So, which one is recommended?
I dont really mind the flow rate reduced. But my question is will it spoil the filter (202?..by adding additional stress on it?
thanks guys
Honestly, I think you're trying too hard for the wrong reasons.
First of all: both filters would be filtering biologically. Mechanical filtering is done on the edge of the very first filter sponge that holds back the debris. Everything behind that is biological filtering, even if it's just a sponge. I don't mean to say there can be no reason for using two canisters but it certainly isn't to separate the mechanical from the biological filtering.
In addition to that I see most of the problem in priming this setup. Once at the beginning and again every time you remove and reconnect one of the items. I can imagine this being a royal pain in the behind.
You'd certainly have to do more than a second 1.4 liter canister to shut down a strong pump like the 1000-liter-an-hour 2-meters-of-height-difference 2028 pump. Eheim pumps' output can be reduced by as much as 50% within their specifications so I guess you're not breaking the pump instantly. (Again: Don't try to throttle the input of a pump, you'd be strangling it.)
But then does the addition of the 2224's 1.4 liters to the 7.3 liter canister of the 2028 really make that much a difference yet? A difference that makes you go through all the trouble, not to mention wasting a perfectly fine 2224 Eheim professional series canister filter to make a miniature filter tank?
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JotheDragon, welcome to AQ!
I would like to recommend that you keep the 2 filter separately instead of daisy chaining it together. The advantage of having 2 separate filter running in a single tank is that when you switch off 1 for maintenance, the other one would be kept running to help filtered out the 'gunk' in the water column. And when you connect back the filter, it's filtration capacity will be building up as the beneficial bacteria will slowly but surely start to colonise the filter that was taken off for maintenance. And after a month or so, the 2nd filter will be then taken off for maintenance as the 1st filter should have accumulated enough beneficial bacteria in the filtration media to accomodate the bio load.
But if you daisy chain 2 filter together, once you remove them for maintenance, you have ZERO filtration for your tank. And after cleaning the canister filter, you might have beneficial bacteria level that were lesser than the levels you have before the filter was removed for maintenance. Also, with the sudden introduction of the tank water into the canister filter, the beneficial bacteria might have some trouble coping with the large amount of 'gunk' that is passing through the filter media. It would take some time for their number to build up to cope with the amount of 'gunk' that is needed to be broken down. And before that levels are reached, the water will flow back into the tank 'uncleaned'.
What to do with the 2 canister filter now? I would recommend you run the 2028 as per normal setup but the 2224 should be attached to a surface skimmer to skim away the oily films found on the surface of the water. Use the KISS method for your setup.
Hope this helps!
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Jothedragon - Sorry, could not finalize my previous post thus I guess this caused a missunderstanding.
My advice would be - listen to the above advices and do not try to connect two canisters in series as it will cause you lots of problems. Keep the filters separate, loaded with different media type if you wish, and they will perform enough mecanical filtration as well as bilogical.
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