I hope I'm doing this right this only the second time I tried to start a discussion. I just purchased a jebao rw15 pump and I must say this is way more powerful than my vortech 40. I have set it on the number 2 setting on wave 1 and is moving the water easily across my 60 in. tank. So far my only problem with it is I didn't see anything in the literature that when the controller is set in the "else" mode(random flow) that is preset at the highest flow rate, which is way to much for my aquarium. If anyone is thinking of purchasing on of these I would be happy have you come over and see it inaction. I will probably buy the rw8 next time.