Coursair
Aquarium Advice Addict
Regardless of what fish you have, you need a filter. If you decide on a Betta tank, make sure Filter has adjustable flow.
For a 10g I'd recommend an AquaClear
AquaClear 20 Power Filter - 110 V, ...p/B000260FVG/ref=cm_sw_r_cp_api_9aDkzbGF6WFP9
If money is tight, this one will work. I have an Aqueon that's been running about 8yrs now.
Aqueon 06080 QuietFlow 10 Power Fil...p/B000SP65N8/ref=cm_sw_r_cp_api_qcDkzb322K891
For a 10g I'd recommend an AquaClear
AquaClear 20 Power Filter - 110 V, ...p/B000260FVG/ref=cm_sw_r_cp_api_9aDkzbGF6WFP9
If money is tight, this one will work. I have an Aqueon that's been running about 8yrs now.
Aqueon 06080 QuietFlow 10 Power Fil...p/B000SP65N8/ref=cm_sw_r_cp_api_qcDkzb322K891