Need some help from the CA crew please. My wife has really been struggling with her tank for a while now. Tank is a JBJ 28g Nano with the 40 watt LED hood. Hang on back skimmer, additional flow from small powerhead and dosing 6 mL of All-for-Reef daily. Been up for over a year.
She is in the middle of a fishless fallow period hoping to rid the tank of a suspected ich issue so it is really only corals. Mostly zoas, RFA, a couple of frogspawn some favites and up until recently a poci and a birdsnest. Trouble is nothing is really thriving. More like slowing wasting away. RFAs getting smaller, favia losing color, etc. Poci and birdsnest died out this week and she lost 2 encrusting stylopora that had been doing well. Oddly enough the zoas are doing the best when they previously had suffered.
She believes it is dinos. The large cell amphodinium type. She bought a microscope to confirm. We sent an ICP test in and it came back better than our main tank only showing lacking in Flourine, low in molybdem. Nitrates and phosphates are better controlled than I can get the big tank.
She is trying a dosing of H2O2 in the evenings followed by MB7 and Silicate during the day. Manual removal has yielded little result. She has been running the lights on all blue for 2 weeks as she read this will help (lack of light may be what led to the sps deaths). It has a hang on back skimmer that is not really pulling anything out (not overly suprised as there ha e been no fish to feed for 7 weeks). I striped that down to clean it and no change.
PO4: .10
NO3: 17.0
Ca: 400
Mg: 1385
Alk: 8.0
Any suggestions would be greatly appreciated. Thank you.
Pics below are from today. I did a full vacuum cleaning of the sandbed yesterday.