Costco is hard to beat, esp for their return policy. Here's one on the less expensive side. I use 2 of these in my house. One for frogs and one for the kitchen. The only complaint, housing cracked in one of the canisters and water went everywhere for several hours at full house pressure (luckily it was the basement unit, which was close to floor drain, nevertheless big mess!). The pump is a bit loud, but it's livable. Overall it works, minus the hick-up.
