Baffled about my Dunkans

J

jprosek

New member
Fellow reefers,

recently, 4 months, I moved from a Fluval Edge 12 gallon to a drilled 30 gallon.
I cycled the tank for 6 weeks, all water parameters are great.
I have a DIY LED fixture that has 40 1.5 A LEDs with 80 degree lenses on 4 circuits, 2 blue 1 cool white 1 colored All running 40% or lower (LOTS of LIGHT!)

All of my corals love the new tank except for my 2 Duncan colonies. They rarely come out and I am worried.

On the Fluval I had a low PH issue Since the new tank I am dosing KH so Alkalinity is a solid 9 dKH. I also use a ATO with Kalkwasser and my PH is 8 to 8.35

Again, I am confused these things used to be WEEDS now they hide. All water parameters are spot on but Duncans are hiding...

Any Ideas?
 
Pics help, but I'd bet they just need a little time. Too much light maybe. They also don't like direct flow. Here's a photo of mine five inchs offset my Mp10 @30%.
 
Mine like relatively low flow and low light. A Ph of 8.75 is very high, but that being said if all your other corals are doing fine it is probably a light or flow issue. I am unaware of any pests that target the duncan per se, but maybe there is.
 
My Duncan grew to 12 heads from 3 in like 6 months! I had it dead center of my tank with not much flow on it, and then all of a sudden they shrunk up for a week (I think something stung them) but I thought they were goners until I put it on the bottom of my tank with a little more flow and they're making a come back!
 
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