Do you dose anything for trace elements?
No. My previous tank I had for 2 years with no water changes, and then did an IPC test and it all came back fine. I've read a few articles that pretty much say you add trace elements through the food you add, so no need. I've been very careful with the DSB, so hopefully it will all work as an ecosystem. I only dose Cal, Alk, Mag, and not very often as I have softies now. I'm planning to try some LPS, but I recon my angel will much them, so not holding out too much hope.