Problem with acroporas

[juannnn]

I have been using the zeovit system for a few years with excellent results. I have been noticing for a long time that my acroporas are not well, in the last two weeks they have begun to have stn in the center of the piece (the largest and the ones I have had the longest, more than 3 years) all the parameters are stable, I have looked if any device may have rust and he began to do 15% water changes. Any other recommendation?

[Bugger]

How big are the colonies? They can shade themselves.
How often do you change your RO carbon?
Has the city changed its water supply to chloramine
Do you live near Ohio?

[G.Alexander]

I have some more questions:

Can you please share some pictures of the affected corals ?

Are all kind of corals affected or just some kind ?

Have you changed anything or installed new equipment in the last couple of weeks ?

Please double check Ca, KH, K+ and salinity with different accurate test kits / instrument.

The temporary increase of water change is the first thing I would do, three water changes each 15% within the next 10 days to see if this does have a positive effect to the corals. Have you already seen negative / positive response from your corals after the first water change of 15 % ?

You have described that the problems started a long time ago so it was a slow process which at the end has created TN at the corals ?

Which kind of carbon do you use ?

Please check the flow through your ZeoVit reactor by measuring it to see if it is to high.

What are the actual PO4 and NO3 levels ?

G.Alexander

[jacky]

You can also fill in the following questions, so that we can know more, and please answer G.Alexander's question and what you want to add/describe in detail.

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

I would want you to first check the salinity for correctness and precision, do three water changes of 15% each over the next 10 days and see if this has a positive effect on the corals, start with a base water parameter check/potassium actual Concentration levels correct/stable

[juannnn]

How big are the colonies? They can shade themselves.
How often do you change your RO carbon?
Has the city changed its water supply to chloramine
Do you live near Ohio?

How big are the colonies? A span of 15cm, they can be shaded but the loss of tissue is in the center How often do you change your carbon RO? I change it annually, I only change the resins when the tds in the water rise from 1 Has the city changed its water supply to chloramine? No Do you live near Ohio? No, I'm Spanish

[juannnn]

I have some more questions:

Can you please share some pictures of the affected corals ?

Are all kind of corals affected or just some kind ?

Have you changed anything or installed new equipment in the last couple of weeks ?

Please double check Ca, KH, K+ and salinity with different accurate test kits / instrument.

The temporary increase of water change is the first thing I would do, three water changes each 15% within the next 10 days to see if this does have a positive effect to the corals. Have you already seen negative / positive response from your corals after the first water change of 15 % ?

You have described that the problems started a long time ago so it was a slow process which at the end has created TN at the corals ?

Which kind of carbon do you use ?

Please check the flow through your ZeoVit reactor by measuring it to see if it is to high.

What are the actual PO4 and NO3 levels ?

G.Alexander

I have some more questions: Can you share some photos of the affected corals? Yes, it is a green tenuis, I have already cut the other affected piece because it had lost more tissue, the cuttings are all good. It was a desalwii

Are all types of corals affected or just some? Only some, two large pieces and some smaller ones. Acropora desalwii, tenuis two, aculeus and a carduu

Have you changed anything or installed new equipment in the last few weeks? No Double check Ca, KH, K+ and salinity with different accurate test kits/instruments. I just did it and the results have been identical

The temporary increase in water change is the first thing I would do, three water changes every 15% within the next 10 days to see if this has a positive effect on the corals. Have you already seen a negative/positive response from your corals after the first 15% water change? Today I made the third change and I have seen positive changes in the corals, I think the stn has stopped, I see some corals better and a little more polyp

Have you described that the problems started a long time ago, so it was a slow process that ultimately created TN in the corals? Since summer I have observed that they have not taken on a good color and good expansion of the polyp, I thought it was because of the heat, then because the nutrients were very low and I tried to raise them and in the end the stn began in some pieces

What kind of charcoal do you use? Zeovit, I haven't used it for two months. I'll put it back on Wednesday

Check the flow through your ZeoVit reactor by measuring it to see if it is too high. Everything is correct

What are the actual levels of PO4 and NO3? Measured today p04 0.01 No3 5

I'm sorry for taking so long to answer but I was doing tests and improvements in the aquarium. I currently have 300 liters with 3 large fish (naso, diacanthus, chelmon) and 5 small ones. Do you recommend adding more fish? I don't know if increasing the quantity will be better for the acroporas. A month ago I had nitrates and phosphates at 0

[juannnn]

You can also fill in the following questions, so that we can know more, and please answer G.Alexander's question and what you want to add/describe in detail.

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

I would want you to first check the salinity for correctness and precision, do three water changes of 15% each over the next 10 days and see if this has a positive effect on the corals, start with a base water parameter check/potassium actual Concentration levels correct/stable

Answer the questions when I signed up a while ago. The only thing that had not been measured for a long time was potassium, he began again to take weekly measurements in case it drops below 380

[G.Alexander]

Hello Juan, lets keep the weekly water change @ 15% at the moment. From your last post I would expect the potassium level is ~ 380 mg so optimal if the test kit result is correct.

Lets add carbon again but at the moment just use 50% of the recommended quantity and low it passively in the sump in a mash bag.

Lets additional reduce the reactor flow to 75% temporary for the next couple of weeks.

As you mention that corals are already looking better I would not do additional changes at the moment to give them time to recover. I would also not add additional fish at the moment.

Please post your full dosing regimen and how much ZeoVit material you have in the reactor.

G.Alexander

[juannnn]

Hello Juan, lets keep the weekly water change @ 15% at the moment. From your last post I would expect the potassium level is ~ 380 mg so optimal if the test kit result is correct.

Lets add carbon again but at the moment just use 50% of the recommended quantity and low it passively in the sump in a mash bag.

Lets additional reduce the reactor flow to 75% temporary for the next couple of weeks.

As you mention that corals are already looking better I would not do additional changes at the moment to give them time to recover. I would also not add additional fish at the moment.

Please post your full dosing regimen and how much ZeoVit material you have in the reactor.

G.Alexander

Hello Juan, let's keep the weekly water change at 15% for now. Based on your last post, I would expect the potassium level to be ~380mg, so that is optimal if the test kit result is correct. If in a week I will measure again to know the consumption.

Today's medicion was 390mg

Let's add charcoal again, but at this point only use 50% of the recommended amount and passively lower it down the sump in a mash bag.

Okay. I will do

so Let's further reduce the reactor flow to 75% temporarily over the next two weeks.
Okay
Since you mention that the corals already look better, I wouldn't make any additional changes at this time to give them time to recover. I would also not add additional fish at this time.

How many fish do you recommend? Just enough to maintain good parameters or a high number for the corals to feed on their feces

Please post your full dosing regimen and the amount of ZeoVit material you have in the reactor.

for 300l 500gr zeovit material Sponge power 2 x week Zeobak 2 x week Coral booster 2 x week Flatworm stop 2 x week In a week I will run out of zeovit products and I have to buy again. Any recommendations for the future?

[juannnn]

When I do water changes I see that the corals improve, but now they are off again, I don't see them as healthy or happy as before and I don't know what the problem is

[G.Alexander]

Hello Juan, sorry I totally missed your last post. Difficult to say but as you mention corals are doing better after each water change might have the reason that there is anything in your system leaching harmful substances like metal or plastic softeners etc. When you do the water change they get watered down so the concentration is temporary lower but this is just a theory.

Can you please share a picture of your sump which does show the equipment you use, also please check if you have any hoses in your system which are not silicone and if anything is made from soft plastic.

Do you still run your reactor with 50% of the recommended flow, please also update your actual PO4 and NO3 level.

Please also share some clear pictures of some affected corals.

Can you also tell which kind of carbon you use and if you run the original ZeoVit material ?

G.Alexander

[juannnn]

I think that it may be something that is contaminating the aquarium, but I have checked everything and I have not found anything. The aquarium has been set up for 10 years, and the system of pipes and tubes for balling has always been the same. It is a very strange thing because many corals are fine and others that I can classify as more delicate do not look good. In general, there are days when I see the corals as dull, others, however, much better. Especially the yellow ones.

Can you share a picture of your sump showing the equipment you use? In the sink I only have rock and the zeovit reactor. I will upload a photo in the next post

Are you still running your reactor at 50% of the recommended flow? If I have it at 50%. I currently have 10 no3 measured with sslifert. And 0.02 hanna

Can you also tell what kind of carbon you use and if you use the original ZeoVit material? I use carbon and zeovit material

[G.Alexander]

Thank you for the additional details Juan, do you keep plating Montipora corals and / or Hystix ? If so how is their coloration and growth ?

G.Alexander

[G.Alexander]

Hello Juan, I would additional recommend you a ICP test, maybe it will show something.

G.Alexander

[juannnn]

Thank you for the additional details Juan, do you keep plating Montipora corals and / or Hystix ? If so how is their coloration and growth ?

G.Alexander

No I don't have, I have only acroporas