Mitch, heres the piece about connecting them up.
7. Automation of the system with dosing pumps
The plankton cultures need daily maintenance. Both, the algal and the rotifer culture have to harvested, diluted and fed daily, to keep the high growth rate.
This effort can be minimized by the use of dosing pumps.
In the following, a system is described,where an aquarium with invertebrates is supplied with live plankton every day.
One dosing pumps sucks water out of a tank or the aquarium. It is adjusted, so that the amount pumped per day is app. 1 Liter. This is controlled by a time switch. As the water from the aquarium might contain zooplankton, it has to be filtered. Here a 10" Filter housing witha 5 µm filter cartige from the reverse osmose can be used.
This filter retains all zooplankton from entering the algal culture. From the filter, the water enters the algal culture. The water is added into the air pipe with a T-piece and pumped into the culture together with the air. The plankton light reactor is supplied with an overflow. The inflowing water forces now the same amount of algal culture to flow out into the zooplankton culture. It is important to switch a drip counter between the algal and the zooplankton culture to avoid, that rofifers enter the algal culture.
A second dosing pump adds parallel to the first one fertilizer into the algal culture from a storage
I had heard form people they make a cascade, but personally i think there will be problems with the culture reproduction rates seen as both cultures have the same vessel. I recon building a purpose built one would be more suitable. oh well.