I was just thinking - it's not 'random', but tidal swell mode has a minimum speed of 50%. It works better when there's two pumps on opposite sides of the tank, but it does a ramp up from 50% to like 65% or something, then down to 50, then a ramp back up but to like 75%, then back to 50%, then a ramp up to 90ish%, then a period at 100%
Seeing as all reef crest is doing is going up and down, it might accomplish what you're looking for? I've got my pumps back on tidal swell after a horrible failure of an attempt to create a gyre, and it seems to be getting flow to the centre of my tank where it's been dead since removing the MP60s
|