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[G.Alexander]

Please take a look at this article:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3222987/

Even PETG does leach substances, we do not know how corals do react.

Stresses increased the release of chemicals having EA. Leaching of chemicals with EA was increased by common stresses. For example, one unstressed sample of an HDPE resin (P5 in Table 3) that had no detectable EA (i.e., RME2 < 15%) in two saline extracts and two EtOH extracts released chemicals with EA equivalent to 47% RME2 when extracted using EtOH after the resin was stressed with UV light. Similarly, two samples of low-density PE resins (LDPE resins 1 and 2) and PETG resins (PETG baby bottle and PETG resin 1) that had no detectable EA before stressing subsequently exhibited EA when stressed, especially by UV (Table 3). Samples (n > 10) of products made from PETG resins advertised as BPA free all released detectable EA when stressed, especially by UV light. Similarly, 25% of unstressed samples of PET and 50% of unstressed PS products surveyed did not have detectable EA in assays of EtOH and/or saline extracts (Table 1). However, when stressed and assayed using both saline and EtOH extracts, all PET (n > 10) and PS (n > 10) products released chemicals having detectable EA in at least one extracting solvent (Table 3).

To rule it out I would recommend you to remove / replace the basket.

Have you observed that the cyanos do increase while you do more water changes ?

You have some kind of sand in the tank, can you tell us which kind of material / product it is exactly ?

I would also like to know if you have the cynao issues since the beginning or if this has started over the time ?

G.Alexander

[jacky]

[QUOTE=G.Alexander;n605527][SIZE=14px][FONT=Arial]Please take a look at this article:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3222987/

Even PETG does leach substances, we do not know how corals do react.



Thanks G.Alexander, this made me learn more

[Dariusz Chomiczewski]

I'll take out all the 3d prints well

Yes, after changing the water, I see that cyano, grows faster, so I do not change the water
The sand is kz aragonite and ReeFlowers Pearl White Sand 0.5-1

Cyanoma was only at the very start of the tank, maybe for a month later it was gone. The problem with cyanogen and diatoms started about 6 months ago. When tds from rodi indicated bad values, diatoms went away quite quickly, but cyano, all the time is

The link does not contain a virus in the link: two videos aquarium and samp


https://photos.app.goo.gl/exL9B2eZWrrxixAG7

[Dariusz Chomiczewski]

Wszystkie wydruki 3d wyjmę dobrze

Tak, po podmianie wody widzę, że cyjan rośnie szybciej, więc wody nie podmieniam Piasek

to kz aragonit a ReeFlowers Pearl White Sand 0,5-1

Cyjanoma była dopiero na sam początek zbiornika, może przez miesiąc później już go nie było. Problem z cyjanem i okrzemkami zaczął się jakieś 6 miesięcy temu. Gdy tds od rodi wskazywały złe wartości okrzemki dość szybko zeszły ale cyjan cały czas jest

Link nie zawiera wirusa w linku: dwa filmiki akwarium i samp

[Dariusz Chomiczewski]

https://photos.app.goo.gl/exL9B2eZWrrxixAG7

[G.Alexander]

There is some kind of a similar object (yellow) in the sump, I would recommend to remove it also. Can not tell you if the two objects do really cause any harm but I would like to rule it out.

Please additional vacuum the sand regular while the water change to remove all the sediments from the deeper layers of the sand.

As you mention that the cyanos do improve after a water change I would try temporary another salt mix, also cross check if your TDS meter is really accurate, the “cheap” hobby TDS meter are not really working very well from my experience.

Additional try to dose 6 ml CoralSnow Standard mixed with 3 drops ZeoBac daily for the next 10 days. While doing this no separate ZeoBac dosage is necessary. While the “treatment” switch off your roll filter for a couple of hours. Stop dosing AminoAcid and B-Balance at the moment.

Because of the sand, have you mixed it with any kind of live sand ?

G.Alexander

[jacky]

I also additionally recommend you get BioMate @ 6 drops every other day for 2 weeks, otherwise 2 times a week.

[Dariusz Chomiczewski]

I will do everything you advise well,

water change within 10 days 3x 15%
biomate every 2 days 6k
for 10 days cs6ml+bk 3k

tell me what else to buy because I want to order
preparations
zwozym???

[G.Alexander]

If you like to you can add ZeoZym also, otherwise at the moment no additional products are necessary. First to fix are the cyanos in conjunction with adjusting the water parameters to the recommended ranges:

KH 6.5 – 7.5
Ca 400 – 420 mg
Mg 1250 – 1300 mg
K+ ~ 380 mg

NO3 is elevated also but at the moment I do not see a problem with it, it should come down over the time.

Make sure to vacuum (clean) the sand regular at each water change.

G.Alexander

[Dariusz Chomiczewski]

Thank you for your advice

I'm slowly running out of salt to buy poor or rich I'm currently using this one https://reefbuilders.com/2011/12/02/...auna-marin/

[G.Alexander]

I have no experience with this salt but it would not hurt to change salt brand from time to time. TM ProReef would be a alternative, also the salt from Korallenzuch if you are able to get it.

G.Alexander

[Dariusz Chomiczewski]

and the results of the water have arrived, I already know that the test for K is sharply distorted and the Ghl probes work correctly

link to results
https://aquaforestlab.com/pl/results/xv1gE97q49676

I know I need to buy a drug
Sr
I


but how can i get rid of it
Al
Ba


please give me suggestions

Thank you

[G.Alexander]

The ICP test results basically looking good and I do not see a reason from those parameters causing trouble to your corals. Al and Ba are elevated but I do not see a reason for issues with those parameters. The Al might come from your rocks or the material in your CaCO2 reactor but as mention before the actual level is not dangerous and should not cause any issues. The lower Sr level is not really a issue also, just ignore it.

I would additional vacuum the sand while each water change for a while and change to another salt brand just to rule out any issues with the one you use at the moment.

After those corrections give your system some time to see if the situation gets better.

G.Alexander