Too Many Filters?

Tpane27

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I run a fluval c3 on my 29 gallon with a decent sized air stone. Would it be too much to have a smaller, less powered underwater filter as well? Just to help with maintaining good water parameters. Everything seems to be fine just wondering if there’s ever such thing as too much filtration
 

fissh

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there is no such thing as over filtering. unless your fish are bouncing off the side of the tank.
 

Dray

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Generally speaking, it is impossible to have *too* much filtration unless your fish are too sensitive for the current. Even then, you can reduce the current by using a spray bar, by positioning plants/decor in front of the return, or by removing the air stone.
 
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Tpane27

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Dray said:
Generally speaking, it is impossible to have *too* much filtration unless your fish are too sensitive for the current. Even then, you can reduce the current by using a spray bar, by positioning plants/decor in front of the return, or by removing the air stone.
Any recommendations for a smaller filter that works well that’s underwater?

fissh said:
there is no such thing as over filtering. unless your fish are bouncing off the side of the tank.
Any underwater recommendations that are somewhat small but strong?
 

fissh

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Most of the cheapo submergible filters that you can buy online will work good as a backup filter.
 

DylanM

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Tpane27 said:
Perhaps! I’m not very well educated on underwater filters or types
There's pretty much just sponge filters, as far as I'm aware. Under gravel filters don't really exist anymore and have tons of problems, and the "underwater" HOB filters are more expensive and substantially worse than a normal sponge filter. You probably want a sponge filter.
 

Dray

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My recommendation would be a CubeFilter from Swiss Tropicals. But there are MANY sponge filters out there that are cheaper and almost as good.
 
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Tpane27

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DylanM said:
There's pretty much just sponge filters, as far as I'm aware. Under gravel filters don't really exist anymore and have tons of problems, and the "underwater" HOB filters are more expensive and substantially worse than a normal sponge filter. You probably want a sponge filter.
Gonna look into this now. Thank you!

Dray said:
My recommendation would be a CubeFilter from Swiss Tropicals. But there are MANY sponge filters out there that are cheaper and almost as good.
How do sponge filters work in terms of using bio media?
 

DylanM

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Tpane27 said:
How do sponge filters work in terms of using bio media?
The sponge is the bio-media. The water passes through the sponge, which builds up bacteria over time. Way more useful for filtration than the stock cartridge setup that most HOB filters come with.
 

GlennO

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I use an EheI'm Pickup 200 as a back up filter. They are my favourite internal power filters because they are a simple design with just a large sponge that is easy to access without having to remove the filter from the tank.
 

JayH

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DylanM said:
There's pretty much just sponge filters, as far as I'm aware. Under gravel filters don't really exist anymore and have tons of problems, and the "underwater" HOB filters are more expensive and substantially worse than a normal sponge filter. You probably want a sponge filter.
The Ziss Bubble Bio Moving Bed filter has had some good reviews. It's not expensive.

Undergravel filters most certainly do still exist. I just bought one a few weeks ago. As for the "tons of problems", these seem to exist primarily in people's heads and on the balance sheets of filter manufacturers.

I would probably agree that a sponge filter is the simplest and most effective approach to a secondary filter, but there are other viable options.
 
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Tpane27

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fissh said:
try this, they work well
/
I ended up ordering an aquatop caf sponge filter. It’s for up to a 25 gallon and I have my fluval c3 so this sponge should do well. I’ll replace my big air stone with this.

The sponge filter makes almost a gurgling sound. Not loud but you can hear it from when the bubbles come out. Anyone know?
 

Islandvic

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I think the Aquatop might be built similar to some Azoo brand sponge filters I bought on clearance at the beginning of the year. I've got 1 large HikarI Bacto Surge sponge filter that is built identical also. I think the Chinese copy each others' plans.

There were designed to plug in the air line tubing to a port, and the air was released at the bottom. I tried it and the air bubbles coming out were large and I thought it hampered the flow.

I took it all apart and used wire cutter to snip the inner plastic to allow me to slip the airline tubing into the inside of the sponge filter along with an air stone.

This method produced smaller bubbles and more of them. Water flow was greatly enhanced also.

Does your setup use an air stone? If so, is it an older one? They become clogged over time.

If you hold the air line and pull the sponge filter's lift tube to the water line, you can see how much water flow out of it.

The sponge filter I prefer and highly recommend is from the brand ATI and their Hydro Sponge line of sponge filters. Their parts are interchangeable, and have a modular design. They can be stacked together also. I have a fine foam sponge filter stacked on top of a coarse foam sponge filter in our 55 gallon African cichlid tank for example. I buy my ATI products from kensfish.com .
 
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Tpane27

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Islandvic said:
I think the Aquatop might be built similar to some Azoo brand sponge filters I bought on clearance at the beginning of the year. I've got 1 large HikarI Bacto Surge sponge filter that is built identical also. I think the Chinese copy each others' plans.

There were designed to plug in the air line tubing to a port, and the air was released at the bottom. I tried it and the air bubbles coming out were large and I thought it hampered the flow.

I took it all apart and used wire cutter to snip the inner plastic to allow me to slip the airline tubing into the inside of the sponge filter along with an air stone.

This method produced smaller bubbles and more of them. Water flow was greatly enhanced also.

Does your setup use an air stone? If so, is it an older one? They become clogged over time.

If you hold the air line and pull the sponge filter's lift tube to the water line, you can see how much water flow out of it.

The sponge filter I prefer and highly recommend is from the brand ATI and their Hydro Sponge line of sponge filters. Their parts are interchangeable, and have a modular design. They can be stacked together also. I have a fine foam sponge filter stacked on top of a coarse foam sponge filter in our 55 gallon African cichlid tank for example. I buy my ATI products from kensfish.com .
I might see how this works for a little. The bubbles are larger rather than small but still create a lot of water movement. The airline plugs right into it and I can’t see the inside so I may end up taking it apart.
 

coralbandit

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I run the Aquatop sponges in many of my tanks with my AquaClear HOBs .
You will be all set and very happy with your choice .
Just pull it out every now and then and give it a squeeze in water change bucket ..
Most of the Aquatops have a built in air diffuser that work great and need only occasional cleaning ..
Enjoy !
 
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Tpane27

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coralbandit said:
I run the Aquatop sponges in many of my tanks with my AquaClear HOBs .
You will be all set and very happy with your choice .
Just pull it out every now and then and give it a squeeze in water change bucket ..
Most of the Aquatops have a built in air diffuser that work great and need only occasional cleaning ..
Enjoy !
Thank you! It doesn’t appear the sponge really pulls in water. How does the sponge filter work? I only ask since you have the same one. There’s plenty of bubbles but it doesn’t seem to suction all that well. Is it more of a bio filter?
 

JayH

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For volume of water moved per volume of air injected, I don't think you can beat a well crafted Czech lift tube. Swiss Tropicals sells some precision made German ones that move up to four liters of water for every liter of air injected. These are what they use in their sponge filters and their matten filter kits.
 

coralbandit

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Sponges are both bio and mechanical.
You may not notice it sucking up large debris like power filters but they can run a whole tank on their own with proper water changes ..
Most breeders never use anything but sponges ..
The flow of the jet lift tubes by Swiss Tropicals is one of the best ..I have some of their matten sponges also ..
 

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