I believe joncat did not mean that the beckett/downdraft would 'destroy' your coralife machine literally. He meant that the MRC's with the downdraft/beckett foam technology employed to remove the organic waste , in his opinion, was superior to the ASM
technology which, like the Coralife, uses 'needlewheels' to mix the air and water to produce foam.
I have been using Remoras for hang ons and ASM for in sumps but recently decided to try an MRC2R, the recirculating out of sump model from MRC and it is 'better' than the other skimmers noted, but requires both a supply pump and recirculating pump.