Acropora problem

[juannnn]

My aquarium has stable parameters and nothing has changed in my routine, but two milleporas have turned white on one end ... It continues with a good polyp extension, I can't think of anything about it. A month ago I put the zeolites from zeovit, before I used aquaforest. All my corals look good, except the purple plate montipora that has turned brown

[G.Alexander]

Have you already checked or cross checked the potassium level of your system ?

The picture is not really clear so I can not tell if that is just new growth or TN.

G.Alexander

[juannnn]

It is not growth, the tip has turned white, the same thing has happened to me in another millepora. My potassium is 380 After a 50 liter change in my 300 aquarium
Thanks

[G.Alexander]

Difficult to say as what has caused it as all other corals are doing fine but lets keep a close eye on the two corals to see if it does continue. Might any fish have nipped on the coral ?

G.Alexander

[juannnn]

No fish I have never seen the coral sting, at the moment everything is the same. I wanted to tell you that a week ago I observed that my nitrates rose to 10 when they are always below 1. I made two changes of water and now they are at 5. I don't know why. Should I change something in my routine? I keep adding zeobak, zeostart3, sponge power and biomate nothing else. Do you recommend using a product to maintain or increase potassium? My corals look good but lack color in my opinion. I also don't know why the montipora has turned brown
Thanks

[G.Alexander]

A potassium level of 380 mg is adequate, no need to increase it. Can you please update this thread with some more information:

https://forum.zeovit.com/forum/gener...bout-your-tank

Also when exactly have you started to use ZeoVit ?

G.Alexander

[juannnn]

https://forum.zeovit.com/forum/gener...625-zeostart-3
Thanks Alexander

[G.Alexander]

Can you please update the actual PO4 level and your exact dosing regimen ?

Also how much ZeoVit material do you have running and what is the water flow through the reactor (measured) ?

G.Alexander

[juannnn]

Today's measurements
Po4 0.01 hanna No3 5 Ca 430 Mg 1260 Kh 7.6 Zeobak 3 drops 2 times a week Biomate 4 drops 3 times a week Sponge power 3 drops 3 times a week Zeolite zeovit 500 gr flow 200 l / h It seems that the millepora has not lost any more tissue. Now it looks good.. All my corals look pretty good except montipora lila (this brown) my acropora tricolor (this brown) when something goes wrong in the aquarium they are the first to go wrong

[G.Alexander]

Thank you, that all sound good, please also check the systems potassium level which should be ~ 380 mg. I do also miss ZeoStart in your dosing regimen, for a net water volume of 200 liters I would recommend to dose 0.2 ml 2 x daily additional.

G.Alexander

[juannnn]

If I use zeostart 3 dissolved with rodi water, I forget. And potassium is at 380. But I still don't understand why some corals don't look good and why my nitrates have gone up without making changes.

[G.Alexander]

Corals are different so some need just more time to adopt which might be the main reason for the differences. Can not tell you the reason for the increase of NO3 but 5 mg is really not a issue, it will come down over the time again. Not sure if you already vacuum the sand regular while each water change but if might help to speed up the NO3 reduction.

G.Alexander

[juannnn]

A year ago quite all the sand because I had a problem of #no3 and I was able to solve it, at the moment I did not put it back. Do you recommend having it? The aquarium I see that it improves when I make two weekly water changes with one I think it falls short and the corals need elements, the aquarium is full of acroporas

[G.Alexander]

Beautiful tank, at the moment I would not do additional changes and as long as everything is running well and you do not have nutrients swings I would also not add sand at the moment. From my experience a shallow sand bed has a positive impact to the systems biology so maybe adding it later would be a option.

G.Alexander

[Bugger]

White tips are common among millipora. There is nothing wrong with a coral going brown at the base. Most corals in the ocean are brown. As for the spike in nitrate a single dead and rotting snail can send a reef tank into chaos. Have you been changing the zeovit lately? New zeovit can remove a lot of phosphate which can spike nitrate.