Also @revisesociology look for a good water feature tub. They are meant to be buried but I have used one as an outdoor tub for the better part of a decade now. They come in a lot of shapes and sizes but if you search online for "Tuff Stuff TS-KMT85 Heavy Duty 85 Gal Oval Multipurpose Water Feed Storage Tank Tub Container Made from Eco Friendly 100 Percent Recycled LDPE, Black" you can see what I mean.