Goodluck Sip. Meanwhile, in algaeville, the whole sand bed has now been changed. Although, I doubt it will help lol. So, I have changed t5's, all ro/di filters tds reads 0, changed the sand, light schedule decreased, slacking on the feeding, and absolutely no feeding of corals, added some hermits, and some new chaeto, and have done very large frequent water changes. Now, we wait and see if it reappears everywhere...