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Old 01/12/2019, 03:44 PM   #1
stancfii
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Join Date: Jan 2005
Location: Birmingham, AL
Posts: 583
Help with random STN of SPS

Iíve been pulling my hair out trying to figure out the root cause of STN Iíve been fighting since the summer. Alkalinity is stable at 8.0, calcium at 400, Mg 1360, nitrates may be detectable at 1 on occasion using Red Sea, phosphate 2ppb with Hanna ULR. Some SPS frags and colonies continue to grow at a slow rate, while others keep fighting STN... and they are in the same places theyíve always been. Iíve changed all RO filters, heater (it was old), new circulation pumps, test kits, everything I can think of other than my return pump (eheim) and skimmer pump (jebao). I dose ALK via Randyís recipe via BRS dosing pump, and Ca is Reef Fusion that I dose once or twice a week as I test for it. Prices like my green slimer go bottom up, but I have a red dragon that has started going top down. My only thoughts are bad salt or too many trace elements since the reef fusion has several in it. I switched to Reef Crystals earlier last year which may have been around the time this started, but I canít really remember. Before that I was using Fritz RPM and everything was growing well and colors were great, but not convinced the salt is the issue since some of the finest tanks Iíve seen use RC. Should I try a Triton test?? Lights are 3 Radiums and 2 VHO actinic, tank is standard 180. I run carbon through a reactor and rowaphos passively.

Thanks for the input.


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180g SPS -3 x 250w Radiums, 2 x VHO actinic, DIY RB LED strip, and a EuroReef skimmer modded with a DC pump.
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