Stands.
Their are many ways to build a stand. This design has served me well over many fish houses. I use planed 2x2" which is packed at 44 - 46mm. Screws go all the way through. This flimsy looking design has taken 24" wide tanks with a rack capacity of 2 and a half tons. I think this was as far as the design was safe to go in a 3 bay arrangement.
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 First stand up & varnished. Note the open top layer. This gives an extra tank over 3 bays. | 
 Viewed towards the door. Note the gap between the stand & door. This will be a packing area & somewhere to put the microscope. | 
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 Note the daylight coming 
          through. The fish house was designed for maximum light exposure. |  | 
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 Centre stand towers constructed. These are 18" wide & required a stronger stand made from planed 3 x 2". | 
 Fresh water stand completed. This will feed the bottom 3 layers of tanks by gravity. Eventually these tanks will be replaced with drilled base tanks & 75% of the fish house will be water changed by the flick of a tap. | 
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 Fresh water stand at far end. Two large 70 gallon tanks to be put on bottom row. | At this stage the fish house resembles a cross between a building site & somewhere to keep fish. Note brine shrimp hatchers on the floor & temporary striplights set up over the tanks | 
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 Centre stand during wiring up | 
 Centre stand during wiring up | 
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 Wired up & ready to go. Note stand supporting roof centre. Whilst a foot of snow is unlikely I had in mind walking on the roof to clean it up & replace plastic fixtures which do perish. | 
 Note striplight position. Tanks will be drilled for drainage. Pipes will pass through the centre of the stand. | 
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 Fry tub stand tagged onto the centre stand. | 
 Fry tubs. These are wallpaper 
          roll soaking tubs from B&Q. The plastic is safe for fry & they 
          hold one gallon. | 
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 Fry stand shown tagged onto centre stand. | 
 Stand from other side showing dehumidifier which takes out about half a gallon per day. |