Vanadium increasing

[waterchange scandal]

Hi. I´m restarting the tank. The problem is vanadium. It is increasing, today its level is 0.2350 mg/l. The normal level must be 0.00 - 0.0025 mg/l. Maybe due to pumps, ceramic rocks, coral plugs, home pipes....
How much water I must to change in one time as much?
My zeovit tank has 300L
I read here zeobak has vanadium, it is true?
Thanks

[G.Alexander]

Vanadium is a metal so I do not think it makes sense to add it to ZeoBac. My first guess are the rocks you have used, have you soaked them adequate enough before using them ?

G.Alexander

[waterchange scandal]

Hi.
The rocks are in tank water from 2015, in March I lost many corals due a change of T5 brand. I was using for years Giesseman T5, and a T5 actinic blue led tube. I bought ATI blue plus and ATI Aquablue special. Giesseman does not make T5 for the moment, they said to me. I burnt the corals with less intensity than Giesseman tubes, maybe due to the spectrum change. Now I´m trying to restart the tank only with LPS, for the moment.
In 2019-01-21 there was 0.1480 mg/l of vanadium
In 2019-10-21 0.2010 mg/l
In 2020-06-03 0.2350 mg/l
Aluminiun is the other thing that is a little bit high, but I don´t worry about it, maybe due to zeolites.
And PO4, (many corals died). I´m decreasing it.
I have to do bigger water changes than usual, no?

[G.Alexander]

Al should also not accumulate from the material, I have no idea where it is coming from but it can have a negative impact to corals. If there is still a source of Vanadium and Aluminium in your system water changes will not really help as you need to find the source. Can you post a good picture of your sump ?

G.Alexander

[waterchange scandal]

Hi.
In 2019-01-29 Aluminum was 0.0721 mg/l
In 2019-10-29 was 0.0736 mg/l
Now is 0.0889 mg/l
I didn´t find any pump or any screw oxidized anywhere.
I used cyanoacrylate or silicone to hold things, probe holder, level switch. Dosing pump is in a good state. The holder of the dosing pump is isolated with silicone tube, its screws are isolated with black tape. The screws of the stirrer are isolated. I see nothing pour aluminum or vanadium. For that reason I blame zeolites of that level of aluminum .
I use grotech cococarbon.
If you need more pictures, no problem.

[jacky]

Separately pump and heater? Keep the equipment running and immersed in water for 2hrs, send the water quality to the testing center, check whether the source, maybe this is possible?

[G.Alexander]

I have some additional questions:

Have you used a PO4 absorber in the past ?
Which kind of method do you use to supplement KH and Ca ?
Which kind of rocks have you used exactly ?
Do you notice any kind of a negative impact to the corals ?

G.Alexander

[waterchange scandal]

Separately pump and heater?
That is a good idea.
I checked pumps and heaters, all are OK.
I will soak the zeolites 48h before using them, not 1 hour as usual.
In 2015 2016 I used grotech po4 absorver.
I use grotech carbonate in that Eheim feeder, it is controlled by GHL KH director, it works pretty fine. KH 7.5
Before that, only Profilux 4 controlled the Eheim fedder. Always KH 7.5
Calcium by dosing pump
I use korallenwelt rocks. Those rocks are very strong, but I found small parts of ceramic in the sand. I think coral plugs of the zoas. There was an unexpected crab that was eating algae on the ceramics.
No, the corals and fishes were OK before T5 change. Now some corals have no perfect color, PO4 is high.

[G.Alexander]

Have you already checked if the rocks do leach those elements or asked someone who is using them also for his / her aluminum / vanadium concentration ?

I would first try to get down nutrients, if corals are doing fine if the system runs nutrient poor stabile I would not do additional actions, if corals do still suffer I would check if the rocks are the source.

G.Alexander

[waterchange scandal]

Hi.
No. No, I did´nt ask that, I only read of ceramic rocks and ceramic components in reef tank. They say there is Vanadium in ceramics.
I saw korallenvelt tanks. They looks OK. I wrote to korallentvelt an email today. Maybe I´m lucky.

Ok. I use zeobak, zeostart, cococarbon, zeovit zeolites and K balance.

This is the email

Hello.
> I bought some rocks of yours years ago. Now ICP test detects Vanadium in the tank water. Could you tell me if you use Vanadium and Aluminiun to do the rocks? Thanks.


No and NOT after years!

Forget the ICP tests or send it to several different ICP companies. You will wonder about the numbers.

Kind regards

Torsten Luther
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I did two test in January 2019, Triton and MarinLab. The same day.