Hi there. I recently received a betta in a vase as a gift and bought a 10 gal tank kit in a hurry. It currently has an undergravel filter and an air pump designed for 20 gal tanks (both outlets are channelled to the diffuser). Point is, I'm dubious of the filter effectivity at removing suspended particles since the water is somewhat turbid.
A store owner recommended me a filter with a submersible pump attached just like the ones he has on his tanks, whose water is certainly crystal clear. Problem is, the bubbles are expelled to the side and I can imagine it generating a huge current within the aquarium. I have also seen cascade on sale although I haven't seen anyone working.
Which kind of filter do you recommend and which flow / capacity is required for 10 gal?
If I change the filter, do I have to start the nitrogen cycle all over again? My tank is about two weeks old.