Buy the Octopus 140. Clint at Black Coral Hawaii sells them. You wont find a better reactor for the price. I think mine with the pump and everything was $250. And it has a 24" tall 6" reaction chamber. You can fit almost an entire bucket of knop coralith in it. The pump is decent (it is haleia or something like that, same company that makes oceanrunner), has a built in bubble counter, real JG fittings, tubing, CO2 check valve, and Clint will help you out with any warranty issues you may or may not have. I have had mine for about 6 months now with no issues. Easy as pie really.