Thanks Anthony, that sets me up nicely, for flow, mine will be well diffused, with an option to "roll" the flow in that chamber, as well.
I have followed your flow-lip technique, and that is the "option". The standard flow at about 50 "times", when fully "dispersed", is still only 8mm per second, of velocity, which is almost "miniscule".
Could you offer some advice or info. on the substrate to use, with the primary objective being the production of "food critters", and where macro algae will be promoted, but is secondary to ( or even in support of ) the "critter production".
Thanks again, > barryhc