Quote:
Originally Posted by seanoman
Over the last few months, we have been battling something with our tank. It is a 220 gallon sps tank. It has now been up for about 15 Months. It seemed to be right around the 1 year mark when everything started going wrong. We had great growth and good colouring on everything. Then all of a sudden it has gone down hill from there. We have lost several colonies and continue to battle to hold on to some right now. Some corals shows no signs what so ever, and then others do. They start to lose flesh, in no particular spot, then eventually completely die. I have checked all my parameters, and they all seem ok to me, except for my alk which might be a little low.
Calcium - 460 (maybe a little high)
Alk - 6 - 6.5 DkH
MG - 1150
PO4 - less than .01
Salinity - 1.026
Nitrate - undetectable
Nitrite - undetectable
Ammonia - undectable
These were all done with Elos test kits aswell.
Every time I do a water change, I do notice an improvement, but within 3-4 days after, it seems to decline. Now I have tried to look up the affects of low DkH, but haven't been able to find much. Is it possible that low Dkh will have this affect on corals? I am trying to slowly raise my Alk with dosing kalkwasser. Any help or advise on this would be greatly appreciated. I am so lost and losing a lot of interest in the hobby. I am not about to give up though, because I know when we figure this out, it will be much better afterwards.
Thanks in advance.
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Couple of questions......
- Are you using Zeovit or any other Ultra Low nutrient systems ie Vodka, prodibio, Fauna Marin?
- How much carbon and what kind are you using?
- Is your make up water ZERO TDS
- Do you run a CA reactor?
- Have you checked your Potassium levels yet?
- What is your basline PH? Does it drop too low at night?
- Refugium?
- what are your daily temp swings? Whats your baseline temp?
- What Salt are you using?
- Does your fish room have good ventilation to outside air?
Until I get some answers I would start by saying that your MG is too low, I run mine at about 1400+. Your ALK is low especially in contrast to your low MG levels and High CA level. Your Specific gravity is good and not to worry about.