I bought a reef octo recirculating pump from Rob a while back. It has a otp-2000 pump on it. Does a pretty decent job skimming. But i want to make a beast skimmer out of it. I was curious if there was a impellar upgrade for it out there(cause i couldn't find one) other than doing a mesh impellar, which is spiking my interest currently to try. Or if there is a similar pump out there that i can switch in it's place to increase skimming potential of it. Appreciated,