I've been hit by velvet 2x. First time I lost just about everything so I feel your pain. If it were me, I'd remove that cardinal fish and start the clock on the fish-less period from that point. You'll need to treat the cardinal before he goes back in the tank if you go that route.Unfortunate series of events happened. Velvet broke loose and killed all my fish except one lone Pajama cardinal that never seemed to be affected. This lone cardinal has been the only fish in the tank for over 3 months. Do i pull him out to quarantine before added any new tank mates?
Having all brand new dry rock- Dino's set in and completely took over. Tried dosing Neophos and Neonitrate during the fish-less phase. Lost over $2500 in Acropora and probably another $1,000 in other corals because I could not keep my nutrients stable and off zeros allowing dinos to choke them all out. Also had a heater fail that did not help any measures.
Rookie mistake loading up this tank on corals with it being immature. As I restart, I plan to take a more simplistic approach to keep all my parameters stable and add corals slowly as it progresses.
Final nail in the coffin- after I defeated dinos I had a battle with Derbesia, which is a devil algae from hell. Going through week 3 of vibrant and it is melting it all away. Sooner than later I hope to be able to restart with precautions.
Frustrating for sure but lessons learned.
Glad to hear you knocked the dinos back. No doubt vibrant works, and you may already know, but it has been found to be an algaecide from what I've read around here. It's not what they claim, bacteria. Not a big deal if you lost most of the pieces you cared about but something to consider if you think about using it once stoked up in the future.
Sounds like you've got the right game plan/mind set. I've started tank upgrades in the past with dry rock and bottled bacteria. While one was pretty successful it was a complete pain to navigate all the early tank stage algaes, dinos ect with acros in the system. Slow and steady has a better success rate and is much less stressful.
Great looking build so far. Cabinet looks clean, nice work!