Thought I'd start to post some pics and updates of the progress and some of the steps along the way incase it helps anyone to learn from my mistakes and successes.
Below is a pic of the room as it is now (very ad hoc) and also the materials we're using to build the new tables and shelves. We are using atructural pine for support including lengths along the base of the tables to spread the load with 25mm "eco" ply benchtops. Dressed pine shelves for misc frequently used items and to mount the lighting as well as to support waterchange dripping buckets. The waterchange method my friend and I have come up with (mostly him) is pretty neat and I'll share the details of how that will work later.
The end result will house 12× 60 litre tanks and 2x 90 litre tanks all of which will be divided into two sections. I will be using a combination biospon and the standard style air driven sponges for filtration - all biospon will be driven by one larger pump hidden away supplied by a large airline around the perimeter and a smaller pump for each table to supply air to the oldschool sponges to ensure filtration and aeration incase of mechanical failure.
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will