Need Help: Purple Monti cap turned green?

[liz62]

My monti was a beautiful purple blue when I bought it but after a couple of days in my tank it has turned almost an army green? It has been like this for weeks! It is growing though.

Ca 450
Alk 8.4
Mag 1600
phos. 0.05
Nitrates - almost undetectable
Potassium 400

24x24x24 tank, Maxspect Led 120w 16k lighting, 25% water changes bi-weekly with IORC salt, MP 10 and WP 25 for flow, and using bio-cubes.

Monti is near the bottom of the tank. Does it need more light? The tank is 24" deep and it is at about 19" deep. All other SPS/LPS corals are healthy and doing great - they are maintaining their colour (even the purple ones regardless of their placement).

Any suggestions or answers to this colour problem I am having are welcome!
Should I be dosing something? I only dose Alk and Pohl's Extra right now.

 

[JimmyZ19]

Need Help: Purple Monti cap turned green?

I notice when I have any detectable levels of PO4 in my tank my corals sort of lose some of their pop. Without fail I test and I have detectable levels. I change out my GFO about every four weeks (when I have detectable levels of PO4). What settings are your razors on?

 

[johnpasternak]

Move it higher

 

[liz62]

The LED's ramp up from moonlights to 100% (all led's) and then ramp back down to moonlight's over a 12 hr period.

 

[AbrahamS]

how is your flow?

 

[liz62]

Flow is great. MP10 and a WP25 at opposite ends of the tank which is 24x24x24" cube.

 

[tripdad]

For now just relax and realize that some corals can take months to adjust to a new tank. As long as it is growing and healthy don't make big changes. I would take a couple of small frags and put them in various spots in the tank and see what happens, it could be location or other things but don't move healthy corals just guessing. What lighting was it under before? Was there a huge spectrum change? What about system style? Was the old tank run similar to your's? I have gotten a coral or two that have completely changed in my tank from what they were, sometimes better, sometimes just different.