Sometimes it just can't be easy. Needed a stronger pump for the ATS, have a mag 5 so that's good. Needed to cut the pipe differently, went out and got a different tip for the dremel, cut the pipe. Put it all together. Several problems. The bigger pump is pulling more water out of the water changing tank so all of the tanks are out of whack. Seemed to have balanced that and am plumbing another pipe to feed the water into the water changing tank. No glue, of course. And to make it all perfect, the tank that holds the ATS is cracked by the bulkhead. YAY! Fortunately, there's only about 5 inches of water in that tank so it isn't leaking ... it's just a matter of time. Plus I opened the skimmer up big time to get more water flowing to the water changing tank and it's stopped frothing. It will probably freak out after I go to sleep! Might have to dial it back a bit to see if I can get it working again. All in a days fun of rescuing the reef....