Over Filtration? - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 20 Old 01-17-2012, 06:14 PM
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One must remember that filters are only effective up to a point. Water changes are often far more beneficial becausing you are removing stuff that filters cannot, plus introducing fresh water.

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 you’re going to take it under your wing then you’re 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 #12 of 20 Old 01-17-2012, 10:12 PM
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Originally Posted by Ridewithme38 View Post
I have a TopFin 30 Filter, a AquaClear 500(110), a 4" 20ppm Sponge filter and a 3" 40ppm Sponge filter on my 29 Gallon tank...
Even with that heavy bioload (ok, mama cass sized bio load) I would think that AC110 would be sufficient, but im just one more addict. 10 filters or 1 filter, they still need maintenance and, as byron said, water changes are big.

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post #13 of 20 Old 01-18-2012, 04:48 PM
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Like j dizzel, I began using air-driven block foam filters in all my tanks. I eliminated my canister filters and the air pump(s). The fish are just fine.

As has been pointed out, the real secret are the water changes: I do mine weekly. I am planning on purchasing that aquarium gravel vac by ye ancient mariner as soon as it becomes available and using that to not only pump the water out, but to filter the phnuk that is invariably left behind.

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post #14 of 20 Old 01-19-2012, 12:28 AM
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Originally Posted by Byron View Post
One must remember that filters are only effective up to a point. Water changes are often far more beneficial becausing you are removing stuff that filters cannot, plus introducing fresh water.
I do a 15 gallon water change every sunday...I think i could cut this down to 10 gallons if i could figure out plants that are easy to care for, high nitrite suckers and goldfish don't destroy...But as this point, i think thats a little beyond my skill level
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post #15 of 20 Old 01-19-2012, 10:00 PM
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hey if i can train my dog not to kick me out of bed, then you can train your goldfish to leave your plants alone

would the goldfish otherwise bother javamoss that was tied down to something really well?

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post #16 of 20 Old 01-19-2012, 10:56 PM
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Can i just say....Aquabid is evil....I'm going to need to buy a bigger tank...i think i just bought another goldfish!

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post #17 of 20 Old 01-20-2012, 12:01 PM
It's amazing how much water filtration is misunderstood. I'll refrain from harping on the silly 4-10 times water flow through the filter notion for a moment to focus on what happens to detritus in the filter...
Hobbyists buy into the notion they need all sorts of water flow to get that fish/plant waste into the filter. Powerful (sometimes multiple) filters and power heads...Out of sight, out of mind.
But what happens to that waste in the filter. All that waste and highly oxygenated water creates a buffet for decomposition bacteria to work overtime to break down that solid waste. With the high water flow, like compost tea, much of the slurry becomes suspended in solution and the dirty water gets pumped right back into the tank. Now if it's a heavily planted tank, the plants would use this (but then the plants would also use decomposed detritus in the upper layers of the substrate) otherwise, it's just dirty water that fish have to live in!
Enter the (weekly) water change - far more than just nitrate removal.

So, in conclusion, it is far better to let detritus (mulm) settle on the substrate where it will slowly, naturally decompose and optionally be removed with the weekly water change/gravel vacuum. Let the far less powerful filter just filter the water column without creating a torrent to collect every scrap of waste.
In a heavily planted tank, little if any external filtration is required - rather we just need gentle water flow for circulation (which is why we hear how well a modest sponge filter works in the planted tank).


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post #18 of 20 Old 02-25-2018, 12:51 AM
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Iam new to the forum and recently got back into fish. I know this is an old thread I have a aqua one 850 series tank so 165 liter tank and rather heavily stocked on fish had to up grade from the original filter as it was just not keeping up. Any way I have put on a 2000 liter an hour external cannister filter and now I have crystal clear water. I was a little scared at first but to my amazement not a whole lot of current and rather quite calm in the water.I also use an air stone in the tank just incase the cannister didn't put in enough oxygen.
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post #19 of 20 Old 02-25-2018, 09:28 AM
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I ended up getting a Sunsun 402 canister for my 29 gallon tank and could not be happier. The attached picture doesn't really show how clear the water is. While clarity is only one aspect, this setup pretty much runs itself with 1 5g water change a week plus feeding. (I do use Flourish for the foreground plants but hope to wean them off nutrients as soon as possible because that Amazon Sword needs no help. It only had about 6-8 leaves in mid December.)
I have the output going across the top at a slight angle from the middle at the back to the front left. This creates some very gentle currents throughout the tank, with a strong stream that some of them like to swim in. If they tire, there are areas where they hardly need to move a fin to stay in place. When I feed, I put the food in the stream so it disperses. The sinking food will make it to the bottom for the corys and kuhlis, and the Swordtails can't hog it all because they are hunting down the floating flakes.
I had some nice tanks back in the 80s, but my 20 and 29 gallon are so much better in every respect, and I only got them a few months ago.
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post #20 of 20 Old 02-25-2018, 02:25 PM
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Here is a better pic of the water. It's like nothing is there. I doubt I could get a better shot with this camera.
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