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Fish tank Filter questions2007-11-24 23:09:38

Please can you help?

I have just started my new 30L tank for goldfish -

It can supplied with an internal submersable filter, the instructions were pants! where in the tank should i put it (as in how high/low in the water) it has a water jet so if i put it near the top of the water can i get away with out using an airpump?

many thanks

Answers:

You can place it anywhere in the tank - lower in the tank will stir the debris like food, making it more likely it will be filtered out but may irritate any bottom dwellers you may get - some fish like Corydoras catfish might like it. Higher up will provide better surface agitation, promoting higher oxygen exchange in the water and evaporation to keep the tank cooler, but might make feeding upper-tier fish difficult without turning it off.

An air pump isn't necessary, if you have enough surface agitation elsewhere. The bubbles don't add oxygen to the water - the bubbles breaking on the surface do, so a good powerhead churning up the water can be used instead. Take into account any plants you might put in there, the type of fish that you plan to stock it with (some don't like any currents, other enjoy them) and the size of your tank.

After that lecture, I personally would put the filter on the bottom in a back corner, with the jet pointing across the back of the tank. Like, if you were to choose the back left corner, point the jet to the right.

As an aside, make sure you know that a 30L will stock 7 fish that reach a maximum of 1 inch in length.

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...the instructions were pants! (?) What in the world?