https://www.amazon.com/gp/product/B00EWENMAU/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 I use this pump in the same setup. The flow is small trickle like the fountain that fills your washcup at the dentist. But its very quiet and doesn't disturb the fish. I run a constant flood setup and grow mint.