[GraviT]

Sorry to hear about the losses, that is not fun at all! I started my tank with Oceanic salt about 6 weeks ago. I'm not sure about how stable the ph and calcium are supposed to be, as I've already had to use a buffer and kalkwasser supliments to keep things up to specs. However, I buy my saltwater for changes pre-mixed from a LFS. I think they use a mixture of Oceanic and IO. I'll add more as things progress...