I have had an empty 140 gal tub "just sitting around" for over a month now. We've had a difficult time determining exactly where we wanted it to be situated. Finally, we decided on our covered carport. The carport is open on two sides so it has a relatively constant breeze - important in our semi-tropical climate (New Orleans, Louisiana) where the temperature outside during the mid-summer to late fall is generally at, or above 90 deg F. The carport will also provide good indirect sunlight, but no direct sunlight.
So far we have only the tub. I am now looking at filters, pumps, spitters (even a UV spitter), etc. I would welcome advice on specific products, but information regarding the flow rate I would want to get through the filter/pump would be fine. Also, we have seen several pump/filter setups that allowed for a very small fountain. The tub is (oval shaped) about 45" x 35" (best I can guess without going now to re-measure it) and about 26" deep - I will want to provide some supplemental aeration but don't know if the fountain would be more than I really want as it may not be feasible in such a small space. It may be better to simply do airstones or perhaps both ?
I have studied a lot of information on "Ponds" - but mostly the data I have discovered relates more to the much bigger "in-ground" versions. This "mini-pond" is really more like an outside rubberized-plastic aquarium. In fact the tub is made by TuffStuff and is designed to be a watering trough for livestock (so it is water-safe, for sure).
I intend to build a retaining wall (stackable landscape bricks) around the tub for aesthetic value - but this will conceal an external filter/pump if I choose to go that way.
Again, any tips are much appreciated. We would like to get this all set up in the next couple of weeks - so we can introduce the fish into the "pond" diring mid-fall when the weather is beautiful and we can spend a lot more time outside. Wintering the fish will not be an issue - and I already have a shop fan for the carport so we can keep the water (somewhat) cool next summer.

