I didn't put anything in but IORC for the first 8-10 months with softies and LPS. I was testing alk weekly and it wasn't until 8-10 months in before I stopped being able to maintain Alk with WC. I think I picked up several SPS just before that...Montis and Birdsnests which both grow quickly. So, I'm not sure if the LPS got big enough or the intro of SPS....but either way it surprised me how little LPS and softies consumed before that.