I dont have but a 100 gal, but between the closed loop on a squid and the return on a 1" sea swirl and 5 mj1200's Im getting good flow, but Im thinking too much for bottom dwellers as it is constant. Then I think a wave maker, but for the price why not just re do it using something like www.oceanmotions.com with pvc getting rid of the powerheads I can always use elsewhere. Any thoughts?