hi shoelace, thanks again for the chiller. The ATS will splash so you should build a splash card or a box for it. I have placed my ATS before the Skimmer and after the Skimmer and have found that both work, you will need something for the micro bubbles, depending on your design it could be a little or a lot. I love my ATS that i got from Turbo. Good luck with the ATS.