Short, fat tentacles on torch

[Aquariumaddictuk]

As title really

Slightly confused as to the short, chubby tents on my 24k torch
They were longer & thinner when I bought it 3 months ago.
Moved into med/turbulent flow area with par of 100.
The dragon soul pictured behind has very thin, flowing tentacles & the 24k just gets fluffier.
It was in 150 with higher par originally but seemed to retract sporadically.
It looks healthy to me but bit puzzled.



Params as of today

Phos .003
Nitrate 3.6
Sal 35ppt
Mag 1410
Cal 460
Alk 7.9
pH 8.2

ICP came back rosy 2 weeks ago with dosing required of iron, selenium & iodine which I've administered

Tank is SPS dominant mixed

 

[Timfish]

I'd say it's adapting to very different conditions from what it was used to. FWIW Looks like your PO4 is low which can make corals very sensitive to light as it messes with their photobiology. .03 mg/l is the threshold level to prevent phosphorus limitation in corals, identified by researchers at Southampton University in England using corals maintained in an aquarium for about a decade. .3 mg/l is what corals are subjected to with upwelling in the ocean. .5 mg/l might be acceptable for some as acros have been shown to increase growth up to this level. .9mg/l is the level the Steinhart Aqaurium's ex situ sexually reproduced acro colonies are being grown out with. Rich Ross's (who's part of the team at Steinhart) has his acro dominate mixed reef sitting at 1.8 mg/l, his tank can be seen at the beginning of his MACNA presentation on phosphate. You can see his current levels as well as some cool videos of corals spawning in his thread.

Rich Ross - Home Tank - guess the phosphate

This tank was built before r2r, here is a link to some links about the build. http://packedhead.net/home-reef/ Current test results: 03-17-2017 Ammonia (NH3-4) Good 0 0.000 - 0.050 mg/L 03-17-2017 Nitrite (NO2) Good 0.006 0.000 - 0.100 mg/L 03-17-2017 Phosphate...

www.reef2reef.com