New to cycling water, need advice

[IcedPineapple]

Hey, I'm getting some new crabs soon and am setting up their tank. I want to make their water dishes really nice, hook up a filter and do bubbles and all that. I've never done anything like that before, and want some advice. They're going in a 20 gallon (3 real small guys) so their water containers won't be huge, maybe 2 sets of 3-4 inches each dimension? What kind of filters and bubble makers do you guys recommend for that small of a set up? They're ecuadorians, which I've never had before, and I've read they especially like salt water so I want to make it perfect for them.

[JoeHermits]

For water bowls that small your best bet would be small sponge filters. They are often hooked up to air pumps so they’ll function as bubblers too


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