DIY Recirculating Bio Pellet Reactor

This is a first go at making a recirculating bio pellets reactor. Using a Chippaypah 1l reactor, eheim 2000 or 3000 pump I not quite sure. Some tap and tubing. This allows much better fluidisation of the pellets and separate control over the flow in and out of the reactor. There is around 1.5l of pellets being very well fluidised. The same pump struggled with 750ml of pellets when set up normally.