It looks like its running with two air stones, what are the green pipes and black box doing? I'm not really understanding how everything works on this.
The black box has a micron sieve in it that allows you to pump water from side to side but not get any cross contamination of the 2 cultures so the roti culture doesnt destroy the phyto culture
Like I said when I get the money and parts together I will do a VERY detailed HOW-TO for anyone interested in doing one of these on there own