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  #61  
Old 01-25-2017, 02:03 AM
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G.Alexander G.Alexander 目前離線
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If your test kit is accurate a Mg level of 1200 mg should not cause such issues.

To support your corals you can reduce the reactor flow to 2/3 for some time, also some bigger water changes (15 – 20%) might be helpful.

Try to keep the KH stabile within the range of 7 – 7.5

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  #62  
Old 01-31-2017, 07:40 PM
StevenmegZ StevenmegZ 目前離線
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Just to confirm, a flow rate through the zeolite reactor of 50 gph (190 Litres per hour) is ok for our system normally? Should we be even lower right now?

We timed our reactor to fill up 1 liter in 19 seconds which translates to the 190L/H.
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  #63  
Old 02-01-2017, 02:26 AM
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Usually 190 liters would be fine for your system size however as your corals are showing TN you can support them by reducing the reactor flow of 130 – 150 liters per hour for some time. As soon as corals recovered you can slowly increase the flow again step by step if you observe a slow increase of nutrients.

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  #64  
Old 02-01-2017, 06:22 AM
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Perfect, thank you!
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  #65  
Old 02-06-2017, 07:45 PM
StevenmegZ StevenmegZ 目前離線
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So we've started recovering from our slight alkalinity spike. We had 3 sps affected; 2 that had TN to the base have fully recovered (polyps still retracted but base fully encrusted).

The one that doesn't seem to be doing well is our green slimer. It actually started TN aim the middle of the coral but it was glued on its side so maybe it thinks it's its base. We've attached a photo of when it first appeared only affecting the middle of the coral and another of it today and how the tips have now faded greyish-black. Tips seem to still have skin but faded that grey colour. Middle of coral pretty sure is skeleton.

Any thought? Should I move it to a lower level in the tank? It was previously growing very well in its current spot.



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  #66  
Old 02-06-2017, 09:26 PM
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Much clearer.....
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  #67  
Old 02-07-2017, 02:12 AM
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Can you please post a closer / better picture of teh corals base ?

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  #68  
Old 02-07-2017, 05:17 PM
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Im not the greatest at taking photos but here are a few close ups.....




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  #69  
Old 02-07-2017, 05:18 PM
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  #70  
Old 02-08-2017, 03:27 AM
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Thank you for the additional pictures, just wanted to see if I can see any kind of pest like flatworms or their eggs but it seems not to be the case.

The skeleton is green at the places which do not have tissue anymore, is this skeleton green already when the coral has lost its tissue or does it become green over the time ?

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  #71  
Old 02-08-2017, 09:58 PM
StevenmegZ StevenmegZ 目前離線
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I belive it was white but soon after had some algae build up on it. We had 2 other sps which experienced TN at the base during our slight alkalinity spike. Bother have fully recovered now. This particular one doesn't seem to be making the same recovery though
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  #72  
Old 02-09-2017, 02:17 AM
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Sometimes it is not possible to stop this even if everything is fine. If I where you I would observe the coral for some additional time and if it does not stop doing two fragments is the most save way to save it. Cut it into the living tissue not to close to the TN affected area.

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  #73  
Old 03-19-2017, 11:48 AM
StevenmegZ StevenmegZ 目前離線
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STN has continued to progress. We tested our NSW today and Alk was 9.3dkh (hannah photometer), potassium was 420ppm. Our red sea batch states the alk value should be 7.9 dkh.

Mix was at 35ppm and 79 degrees which the red sea test values are taken at as well.

Still confused at the issue since it is a water quality issue as all sps are experiencing the same issue.
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  #74  
Old 03-20-2017, 02:49 AM
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It might be the KH, to be sure try to cross check it with a different test kit before starting to let it slowly drop to ~ 7.5

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  #75  
Old 03-20-2017, 08:24 PM
StevenmegZ StevenmegZ 目前離線
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Checked the tanks alk with there photometer (7.7 dkh) and I got 7dkh with a red sea kit (the red sea kit only goes in 1 dkh increments so I know I'm in the ball park).

By adding that 5 gallons of water with 9.3 dkh it raised my tanks dkh from 7.1 dkh to 7.7 dkh. Is there a way to bring the alkalinty down before adding to my tank? Starting to get sick of these alk spikes due to water changes.
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