Pond Boss Forums STOCKING A NEW POND Types of fish to choose 300 Gallon Plastic totes??

You could add a drain near the bottom pretty easy - all you need is a hole through the side, two flanges to bolt or screw together, and one or two rubber gaskets to put between the flanges and the side of the tote.

There is probably a cheaper way to put all this together, but it could easily be done using a pitless adapter for a water well. These are made to go on 6" or so diameter pipe, so they have curved mating surfaces that would have to be ground flat first (unless you mounted it on the corner of the tote???). But pitless adapters are brass, so grinding them is pretty easy. I modified one to go on a 3' diameter shallow well casing once, by opening up the mounting surfaces to fit the bigger curve.