So... I have a 29g Biocube and trying to find some others who will share powerhead flow ideas that may have worked for you. I currently have replaced the stock return pump with hydro Pico 300gph and have a Wp/TW-10 Power Head with the control set on wave about half power. I seem to be blowing sand up or not getting enough flow. I’ve added a korola 425 and even a korola 240 additionally separate. Ideas?