Thought I would chime in here...this thread caught my attention as this was EXACTLY my experience. I was out of the hobby for about 12 years, I came from the true live rock era from the ocean, I had thriving SPS tanks with no issue....fast forward to my current tank. Set it up exactly like I knew how except with man made rock, I added Fritz turbo start and let the rock sit for a month in a container with circulation, then transferred to tank, added more Fritz. Added fish a few weeks later, then SPS at around the 4-6 week mark.
Everything was going great, excellent growth, super low nutrients no matter how much I feed, I mean 0.01-0.04 on Hanna for PO4 and 0 Nitrate on Salifert. Never had a tank with such low nutrients. Ran triton method (which doesn't have a bacteria source, I don't believe), ran a fuge with chaeto which grew like a weed (now I realize I shouldn't have used chaeto from the get go)
Then came the adage, dino's....tank was nasty. SPS started to die off in a massive way...lost probably 90% of my frags and mini colonies.
Could not figure out what was going on, so removed the chaeto, nutrients skyrocketed. PO4 was at 0.5 and Nitrate at 100...dino's gone. Couldn't keep any SPS alive. I had a torch and hammer coral that thrived and that was it.
Then is was actually in a thread I posted for advice that ycnibrc suggested using some bacteria products.
I got 4 Xport Dimpled bricks from BRS, seeded those with Microbacter7, removed the fuge and went with an algae reactor to allow me to have the space for the bricks in the fuge section of my sump and minimize detritus build up.
Then, the key I think was using Zeostart and Zeobak. I started dosing those per ycnibrc starting at 50% and I add Zeovit Coral snow every few days as well. I do not run any other Zeovit products, I still run Triton method with their 4 additives. I do change about 10-15% of the water every 1-2 weeks as well. This was about 4 weeks ago, I have since upped the dose of Zeostar and Zeobak and I', about at 75% now of the recommended dose.
My tank is finally thriving, SPS frags are growing again, the 3 SPS I had left over are actually growing again, new frags are actually surviving and growing at a decent rate. One in particular is growing so fast it's covered the plug since I bought it 2 weeks ago!
I can only think the bricks and bacteria products from Zeovit are what are making the difference!
My PO4 is at 0.3-0.35 and Nitrate at about 30-50....the numbers don't even matter to me though, the corals are healthy and growing, that's all I care about. Chaeto grows a little but not crazy and again I'm ok with that.
I am SOLD on this methodology. Trust me years ago when I did this hobby with fresh live rock from the ocean there was no concern about this stuff, setting up a new tank this day and age I think the bacteria diversity is lacking and the key here.
How many posts do we see in this forum asking for help and the common theme is just like my story, new tank, ultra low nutrients, spa thriving, the algae and crash.....
THIS SHOULD BE A STICKY IMO! Helpful information in here....title it "Can't keep SPS alive, read this first"!
Thanks
@ycnibrc I think you may have saved me from going mad not being able to keep SPS!