@mark)32 I have a 45 gallon rectangular holding tank that I have used for less than. A couple of years to hold saltwater. Selling cheap. Link below if you want to check it out.
Reefs.com Discussion - This is a monolythic one piece pour polypropylene holding tank that is reef safe selling it for a fraction of what I purchased for. Cost me $250 just to ship it. Has holes shown. Comes with a float switch. $140 firm. $35 firm for aluminum reinforcement bars if you want...