fishes

I don't know anything about beta fishes, but I would definitely like one. I used to have one as a child and that was when I was clueless about everything. Can beta fishes live in an aquarium without one of those filtration thingies or do they need one? I'm mostly looking on information about...

Marine ones. Not even sure if there are fresh water puffers.

put in the "silent filter"? i think all the noise goes underwater. it says on the box that the motor is underwater. so is all that noise good for them. they swim around crazy. it seems stressfull.

I'm thinking of buy new fishes to add to my aquarium. But I'm not very sure what to buy. I presently have: 3 filamet barbs 3 gold barbs 1 tiger barb 3 swordtails I'm just thinking of buying 6 cardinal tetras. what else could go nice? please add fish that are not aggressive, easy to manage...

I'm gonna get some to have them as pets :-D but I know it's like a new world to discover. does anyone know a website in english or spanish with information about 'how to get started'

I just changed the water for my fish tank and I noticed how cloudy my turtle tank is, can I use the same siphon for the turtle tank or will the siphon contaminate my fishes once I use it again. I would love to be able to use the siphon for both tanks, it can save me a lot of time!! Thanks in...