good aquarium filter?

I have one part water and part land in a 29g setup. there are only about 4.5 inches of water, so most internal filters do not work. And because it has a sand bed i discarded gravel filters. So naturally turned to external filters. The problem is that most of them are crazy expensive and take off like 260gph, when I could use a fraction of that speed. My price range is like $ 20.

Fluval 1 plus perhaps Fluval 2 … a small sponge filter work awsome and a sponge filter as this guy has to be much better and cheaper than an outsider, because they are more mechanical filters and biological sponge .. but both are ideal http://cichlidresearch.com/simpleaquarium.html ultimatley good luck

JBL’s ‘CristalProfi’ Internal Filter

Penn Plax CIF3 Internal Aquarium Filter 175 GPH Penn Plax CIF3 Features: -Internal Filter. -For aquariums up to 50 gallons. -Completely submersible motor. -Physical, chemical and biological filtration. -Circulates and filters water. -Reliable quiet motor….

DUETTO MULTI INTERNAL FILTER, Size: 10 GAL/13-66 GP (Catalog Category: Aquatics:FILTRATION) Multi purpose filter. For all aquariums up to 10 gallons. Will do 13 to 66 gallons per hour. Great for filtering water and circulation. 5 1/2 x 3 1/2 .Ingredients: Plastic, Metal, Carbon(Included), Sponge, Rubber. Includes: Tube Attachment Adapter, Adjustable Air Filter, Rotating Sweep Outlet, Safety Certified Epoxy Sealed Motor, Mechanical Prefilter Sponge, Silent Air Injection System, Adjustable…