Acropora STN

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Matt_toynton

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Reply #15

It does a little Gav, I just don’t know what’s going on I’ve moved the hammer into slightly higher flow and higher light to see if it does anything


Pics now of both under full light

Matt_toynton

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Reply #16

Ok so popped to the LFS for some bits and had a water test done just to rule out a dodgy test kit, PO4 showing 0 and also No3 0 so the brand new Red Sea kits just bought are both completely inaccurate - what’s the odds ? it would explain the issues and been stripping the tank trying fix a problem that doesn’t exist a bit embarrassed and mad 😡


Would these parameters affect my Hammer and cornet to go long and stringy ?


What’s the best way to raise these slightly ? Over feed a little ?

Gav

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Reply #17

My own experience with the Red sea Po4 kits isn't very good either , they are far from accurate with problems with older kits giving wrong doses of reactants from the bottle dropers too .
My red sea No3 kit matches my salifert kit every time and seems fine .
No I wouldn't have thought those readings if both 0 would affect your coral , there will be background traces of both Po4 and No3 that won't register on test kits .
I normally use salifert kits and don't have much bother with them but with any hobby test kit there will be inaccuracies .
I'd also be a little wary of LFS test depending on which / who's kit they have used , some kits measure in larger increments than others so a low reading may still show 0 .
The fact you've had / got stripping , measured a high Po4 reading and seeing this reduce after adding media would probably suggest the LFS kit may be off and yours correct .


 

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Matt_toynton

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Reply #18

 Cheers Gav, strangely they also used a Red Sea pro test kit, albeit the older variety, my current kit has the green/ blue reagent with pipette this shows 0.08 and will not go lower no matter how much phoscorrex I add , I also have the older kit same as the LFS which also shows 0 although it’s just out of date, I did look at the date on the LFS kit and was well in date.

ajm83

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Reply #19

It does look as though it has started to strip around the edges a little

Yeah agreed, that doesn't look like it's in a good way  :umhum:

Is your NO3 really 0? And are the rest of your results stable from test to test?

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Gav

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Reply #20

If your tests are all good and have been reasonably stable I'd probably run some activated carbon , just incase there was anything extra in the water that shouldn't be , it will also help reduce the toxins released by your softies if planning more SPS , as the two don't agree with each other .
I feel the stripping probably was a result of the Po4 reaching higher levels before adding media . It may take weeks to see what way each coral affected will go , some may pull back others may continue to strip just really slowly before dying completely .

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Asco1104

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Reply #21

I’ve found wall variation of euphyllia more reactive to water quality changes than the branching variation.


Tim

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Matt_toynton

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Reply #22

Yeah agreed, that doesn't look like it's in a good way  :umhum:

Is your NO3 really 0? And are the rest of your results stable from test to test?

I’m pretty sure that’s the case, I’ve triple checked on mine (api) shows 0 got lfs to check again shows 0, borrowed a mates Red Sea No3 and that show 2ppm

Matt_toynton

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Reply #23

If your tests are all good and have been reasonably stable I'd probably run some activated carbon , just incase there was anything extra in the water that shouldn't be , it will also help reduce the toxins released by your softies if planning more SPS , as the two don't agree with each other .
I feel the stripping probably was a result of the Po4 reaching higher levels before adding media . It may take weeks to see what way each coral affected will go , some may pull back others may continue to strip just really slowly before dying completely .

Yep I fear that’s the case - this morning the heads look almost dead

I just wish I knew exactly what is causing this, makes sense though that the damage occurred whilst po4 was elevated and is only just now showing it

Matt_toynton

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Reply #24

Ok Cornet is now dead, now one of my Stylophora is dropping polyps too !


Alk is completely stable at 9.5 however looks like PH is down to 7.7 am I correct in thinking that low PH inhibits the absorption of calc and alk ions ? This would make sense as I’m not dosing and don’t appear to be dropping calc or alk - to be honest I’ve been poor at checking my PH so I’m not sure if this has dropped or when but thinking PH would be better around 8.2-8.3 ? Safe to buffer PH without buffering Alk and in what increments. Also LFS to me to raise temp from 24.5/25 to 27-28 is this good advise ?


Cheers all

Matt_toynton

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Reply #25

Stylo

Gav

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Reply #26

Ok Cornet is now dead, now one of my Stylophora is dropping polyps too !


Alk is completely stable at 9.5 however looks like PH is down to 7.7 am I correct in thinking that low PH inhibits the absorption of calc and alk ions ? This would make sense as I’m not dosing and don’t appear to be dropping calc or alk - to be honest I’ve been poor at checking my PH so I’m not sure if this has dropped or when but thinking PH would be better around 8.2-8.3 ? Safe to buffer PH without buffering Alk and in what increments. Also LFS to me to raise temp from 24.5/25 to 27-28 is this good advise ?


Cheers all

Sorry to hear that , yes low pH will inhibit growth and absorbtion, raising alk a bit can help buffer low pH which would keep corals growing , quite probably the idea behind salts like red sea coral pro where alk is 11.5 dkh to 12.5dkh @ a salinity of 35ppt (1.026) .
I'd also make sure you've plenty of surface agitation to help drive off excess co2 and air from outside to skimmer intake helps too .
Any changes should be made slowly if you plan to .
Yes I'd run a little warmer , I keep mine at 26°c .

Last Edit: Apr 13, 2018 1:12:48 pm by Gav

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HK_Fuey

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Reply #27

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Matt_toynton

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Reply #28

Worth having a read of this:
Low pH: Causes and Cures by Randy Holmes-Farley - Reefkeeping.com
Nice article, I’ll try some of the tests shortly - we are in a new house and is pretty tight - I’ll leave a cup of saltwater outside for a few hours and compare it to a cup left in the house, if there’s no difference I’ll try and slowly raise the PH

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