Forgive the play on words in the title - the chaeto in my refugium hasn’t been growing much since my most recent tank upgrade. Even though I run a large skimmer and ATS, I’ve always needed chaeto as well to keep N and P at low levels because I have a very high fish load. Tank is certainly not macro nutrient limited; in fact since experiencing issues with the refugium nitrates are about 15 and phosphate 0.15. Corals do not appear overly affected, at least not yet. I’ve always had to dose iron to get good chaeto growth, and a recent Triton test came back with Fe at zero, so I am goosing the iron dosing a bit.
Anyone with any alternative ideas of why my chaeto is moribund? What am I missing; what’s it missing?
Anyone with any alternative ideas of why my chaeto is moribund? What am I missing; what’s it missing?