Birdnest tissue dying from bottom up, Acro won't extend polyps.

[Macdaddynick1]

Here is mine happy growing super large on top but dying at base, no problem for it.

You could raise your nitrates and see if it stops the dieback.

 

[Uncle99]

Here’s mine, white on the lower parts likely lack of light related.
4 years, no problem, grows so fast.

 

[thatmanMIKEson]

Here is mine happy growing super large on top but dying at base, no problem for it.

Dang thats a pretty set up!

 

[Wasabiroot]

Obligatory "what's your salinity"?
Hope you can figure it out

 

[gbroadbridge]

I'm about to give up on corals. I can't quite figure this out.


RSR 300XL
2x XR15 running Saxby's
Ecotech S2 return.
25w UV
Red Sea RSK300
ClariSea 3000
2x MP40's Reef Crest mode, anti-sync 45%
1x MP10 at 60% continuous (Bare bottom, helps push crap to the front so I can suction out.)

7 fish:

2 wrasse
2 Clowns
1 Flameback Angel

Also have another small wrasse and Tomini Tang temporarily being housed for a buddy with a tank that leaked. His new tank gets here on the 23rd. So they will be gone before end of June.

Parameters

Hanna:
Nitrate 12-14
Phosphate .03
Alk 8.0

pH 8.3 (5pm just before lights turn blue and start to ramp down. Apex reads 8.0-8.33 throughout day lights on to dark.)

Dose All For Reef 21ml a day keeps Alk at 8.2 Calc 470. Mag 1450. (These are all Trident numbers as of this morning before water change. Red Sea tests and Hanna Alkalinity reads slightly lower for all 3.. Red Sea tests are a little difficult to determine the absolute color for me, but they are all close to the Trident.)

Can't keep stuff alive. I did have a period of low nutrients, before the SPS went in, brought those up dosing NeoPhos and NeoNitro over a couple week period. Lost about 80% of 2 Acan frags, since have slowly started recovering since that. Have a torch that hasn't grown in months, it just stays the same. Zoa frag I got, has had 5 heads for a couple months, good extension, just hasn't grown any new polyps.

Not totally sure where to go from here. Best and most consistent parameters I've had.

You didn't state how old the tank is.

There are many tanks that are not biologically diverse enough to host some coral until well past 12 months.

Chemical stability is easily achieved and is only a minor part of the equation.