I'm planning on using a kiddie pool for a temporary outdoor pond this summer as well. I have a couple of koi , a red eared slider turtle and some pacu that are growing rapidly and need a pond. I was first thinking of using a 300 gallon rubbermaid stock tank but those are at least $180. An intex pool has many advantages at half the price. the weather is still too cold. here in central NY, but in a month I should have a setup to show.