For those interested I found out that the smaller WP25 will be out at the end of April. I got some info on the Jebao WP25 directly from Jebao. This is from Wystan Jebao... He included a picture and a video. The WP40 is on the left and the WP25 is on the right. Here is a video from their testing. WP-25 - YouTube Everything we know about the WP40 and adjusting the flow of it SHOULD apply to the WP25. I would think the controller is the same unit they are just making a smaller pump.