Sponge Filters? - Page 3 - Tropical Fish Keeping - Aquarium fish care and resources
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post #21 of 25 Old 05-04-2013, 04:45 PM
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Originally Posted by Hallyx View Post
Running a sponge filter (and/or airstone) will raise your pH by injecting O2 into the water and out-gassing CO2.
Not always. If you are running a sponge filter on a power-head you are not injecting anything.
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post #22 of 25 Old 05-07-2013, 10:39 AM Thread Starter
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Does the filter need to be run 24/7? I was looking up info and people were saying that during a power outage it's still effective as biological filtration, just not mechanical.

Could it theoretically be run with the lights on a timer?
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post #23 of 25 Old 05-07-2013, 11:08 AM
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Originally Posted by jentralala View Post
Does the filter need to be run 24/7? I was looking up info and people were saying that during a power outage it's still effective as biological filtration, just not mechanical.

Could it theoretically be run with the lights on a timer?
Remaining active during a power outage as biological filtration only applies to a sponge filter, which being in the main tank will be able to obtain oxygen from the surrounding water which will likely be in some degree of movement regardless. Any filter enclosed will quickly run out of oxygen. I only mention this to avoid confusion when others may read this.

As for running the sponge filter periodically, this is possible but not advisable in my view. The filter does do more than just biological filtration; it also circulates the water, and the mechanical aspect is important too. Also, it is at night when oxygen may be less, in planted tanks; and while this is not going to be critical unless the tank is not balanced to begin with, it is something to keep in mind. I would leave any filter operating 24/7.

Byron

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If youíre going to take it under your wing then youíre responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #24 of 25 Old 05-07-2013, 11:18 AM
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Quote:
Originally Posted by jentralala View Post
Does the filter need to be run 24/7? I was looking up info and people were saying that during a power outage it's still effective as biological filtration, just not mechanical.

Could it theoretically be run with the lights on a timer?
Typically they are run like any other filter, 24/7 but with lots of plants there is no real reason to HAVE to run it that way but you will lose circulation in tank which can affect heat distribution. I couldn't do that, particulalrly in the winter, as my heat loss would be too great. Given the choice I would choose to part time a filter and do some testing to see what differences it makes. It all comes down to what works for your setup.

There are some who don't run filters at all... so I would change my answer. Given the choice I would run with no filter, lots of plants and a small power head serving to move the water around the tank. I doubt that my water would be crystal clear but, looking at my jug experiment with no filter and lots of plants, the water is nice and clear... although there are no fish and there is no circulation.

Jeff.

EDIT:
Clarification based on Byron's post (I sit on posts too long sometimes to be most current). I assumed a sponge filter. I wouldn't do this with my canister or even an HOB but like the idea of no filter at all....

It also depends on why it is being turned off, air pump noise affecting sleep trumps 24/7 sponge filtration for example.


Total years fish keeping experience: 7 months, can't start counting in years for a while yet.

The shotgun approach to a planted tank with an LED fixture

Small scale nitrogen cycle with a jar, water and fish food; no substrate, filter etc

Last edited by JDM; 05-07-2013 at 11:24 AM.
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post #25 of 25 Old 05-07-2013, 12:53 PM Thread Starter
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Yeah I meant the sponge filter, sorry for lack of clarification, haha. The air pump isn't horrible, but I definitely notice it at night, I'm sure I'll get used to it though.
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