Peculiar bubbling

Postby TheGurkha » 2006-10-15 21:31

I came back from a weekend away to find teh flow from the pump in the filter in my Mirabello 70 fizzing with bubbles every 5 seconds. regular as clockwork, a fizz of bubbles like a soda siphon and then the regular strong clear stream.

Out of the filter housing, in the main tank, it behaved as expected with no bubbles.

In the filter housing with the filter sponge removed, it worked fine.

Pop the sponge back in, back came the bubbless / no bubbles cycle.

I drew off a bucket of tank water, washed the sponge in it, put the sponge back in and hey presto - no bubbles.

Aquarium is only two weeks old this Saturday just gone, single goldfish will have been in it two weeks this Tuesday.

Anyone any ideas?

It hasn't happened again the last couple of hours since I washed the sponge.
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Postby KittyKat » 2006-10-15 21:47

Could have been that some of the water had evaporated and the filter was catching air instead of water? Or maybe the sponge was so dirty that it wasn't letting through water properly?

Did you cycle the filter before setting up the tank? You should really do a <a href='http://allfishforums.com/index.php?showtopic=1892' target='_blank'>silent cycle</a> because they are less dangerous for the fish... please watch the ammonia, nitrite and nitrate readings carefully! Also be careful because goldfish grow very large and need a large tank or pond to live once they get too big for their current tank!
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Postby Indigo Blue Fish » 2006-10-16 13:23

I have a similar problem with a PANTS spare filter I own.
The problem is that air gets caught inside the impeller chamber.
Take the powerhead off, tip upside down in the water, switch on and off twice.
This should get rid of the bubbles - keep it underwater when you reattach the main body.
You shouldn't have the problem any more.
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Postby TheGurkha » 2006-10-16 14:14

Found the problem, it was the slide-in carbon filter. I have washed that vigourously in old tank water, and the problem went away. I thought it was the sponge in the first filter compartment, but it was the carbon filter that slides into this. With that out of the way the problem went away (it started again today).

I didn't know about fishless cycling until I had started to cycle this tank with the first fish. I am monitoring the water chemicals closely, with liquid kit, and performing water changes etc etc. Ammonia is not showing anything above a trace at the moment and the nitrite is so low it is difficult to tell if it is there at all, so it looks as though it is going according to plan.

Wish I'd known about the fishless way first though.

And for the size of fish, I don't plan on having many, and they will be moved on when they outgrow the tank.
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Postby Mick e. t. » 2006-10-16 14:42

There is another cause of this problem. You can find that if you have an air-stone to close to your filter intakes they will take in air bubbles. External filters are, or can be more suspect as they are usually more powerful, taking in more water, and as stated if to close to your aeration you will have the same problem. :tup:
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Postby sharkdude » 2006-10-22 20:35

the aeration doesn't need to be close tiny air bubbles that are in the watr 'congregate' and form a large bubble is the filter until it becomes so big that whooshe out it comes.
also depending on how much muck is in your filter gas is formed fro the decomposing fish poo.
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Re: Peculiar bubbling

Postby valemont » 2018-09-07 13:58

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