So my return pump went out and since I'm in the middle of a build, my backup pump is being used right now. So, I need a return pump. The only important restriction is that my system has been plumbed using 3/4" ID flex tubing on the return, so the pump must be compatible with that. Other than that I would prefer it be in on the 500gph range, but since it will be temporary/my new back-up I am not going to be picky. I would prefer to do a coral trade. I have a thread at http://www.marinecolorado.org/forum...0-SPS-Zoa-and-acan-frags-Big-hammer-colony-FS but I do have some cash if that won't work. PM me your number with what you have and what you want for it and I will get back to you promptly. Or if I can just borrow a pump for about a week until I can order and receive a new one I will give you a frag of something.