I’ve been running ecotech since they first came out, 2 on my 400 from the sump and 2 in the back as a closed loop. No issues, period with ecotech. I’m thinking about red dragon with a new Dreamboxen sump and that would be the only other return I’d go with. Battery backup on both ecotech returns, have 2 pumps just incase 1 ever fails. Best to always have 2 of everything. Just my 2 cents