I customized a new rear wall, ix nayed all the media, and added a 2.5g fuge, I later added a media filter which fits perfect made for an eclipse sytem ( filterpad/carbon) for water clarity purposes, I run no LR in the back.....you can find the build in the DIY section, It has ATO, Fuge, 70w MH, Tunze skimmer, Kalk doser, 2 koralia nano's and is dominant sps....everything is doing quite well as of late.........