500 L test set up 

My first test set up has been sitting around for over a month now waiting for fish.  The fish will arrive shortly, so I thought I’d take some time to document the set up. 

My system has three core parts to it at this moment. The main tank is 500 liter tank probably filled up to about 350l.  With this I plan to hold 25 fish.  The tank cost about 50 euros. 

On top of the tank I’ve placed a grow bed.  I selected this container for its volume, 170l.  The GB (or media bed)  contains about 150l of gravel and clay grow beads.  The aim of this bed will be to air the water and to run it through the helpful bacteria that hopefully should develop. This bed is a flood and drain system that is regulated by a home made bell syphon – which is much easier to make than they make it seem on the Internet (for instance there is no need for the snorkel). (costs: container = 30 euro, gravel = 6 euro / 20l). 

Lastly, I’ve added a floating raft bed to increase the productivity of the entire system.  This consists of a smaller container ( approx 70l) which fills at the same time as the GB.   

Both the tank and the floating raft system are oxygenated with a single air pump.  And the whole system is powered with a 500l+ pump. 


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