My corals dying!!

[Gi@nnis]

I have an aquarium 200lt and 60lt sump for about 20 months. Everything is stable and every SPS coral that I put in, after 1 , 1 and half month , it's starting dying. I can't understand the reason why it's happening. I have searched everything but nothing can help me.
My recent tests of the water are:
"¢Salt: 1026ppm (with refractometer)
"¢NH3\4: 0 (with salifert)
"¢NO2: 0.07ppm (with hana)
"¢NO3: 0.2ppm (with salifert)
"¢KH: 9,4dkh (with hana)
"¢CA: 420ppm (with salifert)
"¢MG: 1290ppm (with salifert)
"¢PH: 8,3
"¢PO: 0.023ppm (with hana)
Also I feed with flakes, 10ml corals smoothies every 3 days, one spoon with reef snow (tropic marine) every 3 days, 1 time the week 10ml of special blend bacteria and last 2 time the week fresh phytoplankton nyos.

Somebody Help me or give me some advice to save my corals :headwalls:

 

[Mylesweaver]

Potassium?

 

[Whiterabbitrage]

Is this just SPS? All other coral are fine?
What is your lighting?
And which SPS have you tried exactly?

 

[Mylesweaver]

Sps also need high flow much higher than most

 

[Dapg8gt]

There is a ton of things it could be really.. Pics of corals, how they die, system specifics, husbandry, type of lights, what flow you have etc..

I really don't think it's possible to give you any help without those things.. And even with those things there could be thousands of variables like contamination, metal toxicity and so on.. I'd say a good place to start to get some help would be a description of the trend in which they die.. Is it instantly? (days) or over a period of months? Do they loose tissue fast, slow turn brown/white? You would need to add some more info and pics of the corals and system to get an accurate reccomendation imo..

 

[Gi@nnis]

Thank you very much for the prompt reply to my question!
Potassium is 320 and strontium I have not idea!
My light is DIY with led 150W dimmable and 2 waves tunze 6025.
In sump i have macroalgae chaeto and caulerpa.
Skimmer bubble magus curve 5.
What could be wrong?

 

[Gi@nnis]

The acropora in foto was a green acro!Slowly lose their color and got this purple and then proceeded to whiten the edges.

 

[Gi@nnis]

Fish i have Acanthurus Leucostemon, Zebrasoma flavescens, Amphiprion Ocellaris, cardinalfish, Salarias fasciatus, Yellowtail Damselfish.

 

[Gi@nnis]

This Montipora Digitata i have about 2 months, began to die after the first month of the trunk of.

 

[Gi@nnis]

The remaining soft corals live normal but not grow.

 

[Mylesweaver]

Less light. LEDs are much brighter than u thank.

 

[Dapg8gt]

The system seems to be set up correctly from the outside looking in I personally would focus on nutrients, light and contamination/metal toxicity


If this was happening to my tank first thing I have would do is to make sure I have fresh carbon running, grab a poly-filter and run it to rule out heavy metals and look into my lighting. If the poly filter comes back just brown that's one thing to easily rule out.

If your lighting is not up to snuff or to powerful can and will cause issues. Being that it's a diy have you ever ran a par measurement on it? Is the spectrum correct( is it based off of a commercial light or other successful diy rigs)? I do know that when I ran a cheap led unit with to much white I did have coral morph colors on me and not do well. Not saying yours isn't good I just don't know anything about it and don't know much about leds in general,but every symptom you have could definitely be from a light source that's to bright or incorrect spectrum.

Are your test kit results backed up by others? If your nutrients are really as low as you state it could be linked to your alkalinity being high also, there is a link to low nutrients and high alk leading to poor coral growth leading to death eventually. With basically a borderline ulns system your alk should be closer to NSW at 7-8 dkh. Also being able to detect any nitrite on the kit is something I've never been able to do in an established tank but from what I remember its not really detrimental at low levels.

All these suggestions are just some info to do some research on these topics on rc and see if they match your symptoms. I'm not going to be the guy to say rush out and do a ton of water changes etc as deep down myself I feel it's due to your lights (color morphing/pale slow growth) or nutrients pale lps/slow growth and overall pale rtn sps.. That's where I would start personally.

 

[Mark9]

Numbers look great, must be the lights, as others have said.

 

[Jdavis8824]

The lights do look way too bright. Some fish stores will let you borrow a par meter. I suggest finding one even if it's a few hours away cause it will be worth it in the long run

 

[jimbo1]

Silly question but thought I would ask, in the sump, does the bucket have a metal handle and has it been removed also what is that under the live rock??