I have a reefer 350 (a bit bigger than a RS250), and I have an ATI 8000 l/hour and the return pump of 4000 l/h, but for sure I need another ATI on the opposite side
Iv gt a jebao rw4 and am mainly keeping lps and a couple of sps in the high flow areas. I find the systems initial tank turnover plus the 4000 litres per hour the jebao gives is enough for what I want