Soya sauce squeeze container $1.50
Water pump 480L/hr $9.00
First cut container nozzle to fit water pump output, then cut bottom away with a small slot for outflow....cut a piece of sponge to fit at container opening as to disperse flow. Now cap and fill in appropriate amount of media then cover open top outflow with bigger sponge to prevent media to get out.
Now enjoy cheap reactor....
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