There are 10 quality castors, each with a 290lb rating, part 19505T11 from McMaster-Carr. There are 5 castors on each side in a similar pattern to how the number 5 is shown on single die/dice. This again will distribute load to the uprights evenly and avoid any stand deflection. (Yes with the tank filled and all live stock in I can roll it on carpet by myself, all be it slowly.)
And finally the tank sitting on the stand.
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