Zoas dying. Please help?

cane

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One conlony of my Zoas are dying. The tank is a 90gal 110gal with sump. It has been up for about 8 months and doing good till recently. Started dosing Alk/calc 2 months ago and everyone was doing fine. But all of a sudden one of my tourches died and some of my zoas are dying and I do not know why. O I have also not been able to grow acans or scollies.
Getting great growth with everyone else. Last I run an apex. Please Help.

Water
Temp:77.5-78
Salinity: 1.025
PH:8.05 (daytime on apex probe) also tested with Salifert
Alk:10.04 Dosing min recommend (BRS)
Calcium:500 Dosing min recommend (BRS )
Mag:1500

Started dosing because PH was always way to low 7.0 range. Can not get over 8.07 even with a fresh air line going outside from skimmer intake and dosing.

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jenreefer

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What are your No3 and PO4 numbers looking like. Are you feeding your zoas? also, you can dial back your dosing a bit. It is on the high end, but not out of range. Also, what lights are you running? other stuff? carbon? GFO?
 
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cane

cane

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What are your No3 and PO4 numbers looking like. Are you feeding your zoas? also, you can dial back your dosing a bit. It is on the high end, but not out of range. Also, what lights are you running? other stuff? carbon? GFO?

NO3 is 1 ppm and PO4 is at 0. I have fed the tank in the past on and off but not consistent using reef roids. Running SB reef lights at about 40-50%. Been getting great growth with them. Using BRS system for GFO and Carbon. Last I use an RODI system for all of my water.
 
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cane

cane

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I also cut back on my dosing from 27.5 ml per day to 18.
 
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cane

cane

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Thought about it but it has been in the tank from the beginning so I do not suspect pests.
 

saltyfilmfolks

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looks like your running pretty high light. Combined with low nutrients.
 
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cane

cane

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Your parameters are borderline high. Scolys and acans have to be fed if your tank is too clean.

After all the research I think you are right. I fed for a short period of time and they were fine. For no particular reason I stopped feeding and am having this problem. Yes, low nutrients too are an issue.
 

saltyfilmfolks

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Yes I see. How often do you recommend I feed Reef Roids?
I dont feed reef roids so I dont know. The No and Po numbers are the ones to watch. I spot feed most of my corals with what ever frozen im feeding the fish or just the juice.
at the same time I keep an eye on the numbers. As I understand it this is how you do ULNS. It becomes feed hard skim(filter) hard.
Skimmers and chemical filters both have the same risk of over stripping the water.
Higher light makes the corals consume and bring down nutrints more in the tank.
 

Mastering the art of locking and unlocking water pathways: What type of valves do you have on your aquarium plumbing?

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