Receding flesh band

[Reefer_Marc]

Good day everyone

I seem to have a starting problem with my frogspawn and my candy cane coral. It seems the flesh band is starting to recede, even though the corals were growing and extending nicely.
There was some change in the tank, as i upgraded to a bigger tank and redid the whole aquascape. This was around 4 months ago and the corals stayed in the same place since then, they were always nicely extended and grew a bit.
I changed the flow a bit about a month ago, they do not have too much flow in my opinion but still some. Maybe not enough? I am not sure.

I just noticed the flesh bands yesterday while cleaning. For the frogspawn, about a month ago i added a second frogspawn and put it beside the existing one. But the new one started to recede quite a bit so i moved it away into less flow, seems to be doing better for now, even though it was always open before as well.

My parameters are currently:
Temp 25.4
Nitrate 10
Phos 0.08
Calc 450
Mag 1400
Alk 7.5
Salinity 1.025

Attached are some pictures of the two corals and a full tank shot.

I am very thankful for all feedback!

 

[Reefer_Marc]

I additionally made 3 videos of the flow on those corals, so its easier to see in what kind of flow they are

 

[Baldyreef]

any large swings in parameters?
#reefsquad

 

[Reefer_Marc]

any large swings in parameters?
#reefsquad

Theres a bit of swing with alk, im still trying to dial it in on the bigger tank. I recently moved to reduce my AFR dose and used balling light carbonate to keep the alk up. So i have had some swings, usually within 0.3 to 0.5 over a week

 

[Reefer_Marc]

Anyone have any idea? Bump

 

[winxp_man]

Have you done ICP testing? Maybe some metals are too high in the the tank?

Are you feeding the corals things such as reefroids? Mysis?

Any drastic changes in lighting intensity or spectrum?

Basic parameters look good on paper from
What you posted.

 

[Reefer_Marc]

Have you done ICP testing? Maybe some metals are too high in the the tank?

Are you feeding the corals things such as reefroids? Mysis?

Any drastic changes in lighting intensity or spectrum?

Basic parameters look good on paper from
What you posted.

I did not do any recent ICP tests, maybe its time for one again.

I do feed my corals with broadcast feeding, here and there spot feeding. I have two products but cant remember the name right now, have used them for about 1.5 years now.

I added another light when i upgraded the tank 4 months ago, and slowly ramped up the lights again after the upgrade. It hasnt been changed in the last 2 to 3 months though

 

[Reefer_Marc]

Could this be because i put the two frogspawns (new and old) right next to each other and they sting each other and then both receded? I thought frogspawns could be near each other but maybe this could be a factor? Because up to then i didnt notice anything wrong with my older frogspawn