2x ICP test, 2x very high manganese

sasa · Oct 25, 2020

HI FM team,

I could use some help with some very strange readings...

I restarted my tank due to a majano boom. Bleached the rock for 4 days, washed it several time with freshwater and restarted the tank. I did my first ICP at sept 28 with unmeasurable high manganese and high iron & chrome. I used a not so well known salt so I tought the salt mix was bad... Emptied the tank, filled it with fresh water, washed everything for 2 days then emptied again, refilled with RO water and now I used fauna marin professional sea salt. The oct. 25th ICP is 3 days after filling it up - still shows very high manganese and iron.

I checked every single pump - no rust, no damaged magnet, nothing... Tank is empty, only a skimmer jebao return pump and jebao flow pumps. All magnest clean and free of dmg. For rockwork I used Aquaforest stonefix cement, around a half a bottle.

Any idea what may have caused the high metal? Could it be the bleach (used the most simple one with no additives and washed the stones well - also did several 100% water change since that...)

Is there any recommended method to remove the manganese from the tank?

Reefman71 · Oct 25, 2020

I never have any? I have to supplement mine? That’s odd? Did you try to send them an email and ask them? I’ve done that before and they do respond. I was overdosing iodine.

sasa · Oct 27, 2020

@George-Fauna Marin ?

Fauna Marin · Oct 28, 2020

HI.
Sometimes is really hard to say what type of decoration and salts causes which type of high metals, But in case of manganese and iron it come mostly from the anticaking agent which wich is used in some salt brands. The detection if the manganese and iron in this ammount is salt based but this is not bioavailable and mostly after a few days the skimmer take it out

sasa · Oct 28, 2020

Fauna Marin said:
HI.
Sometimes is really hard to say what type of decoration and salts causes which type of high metals, But in case of manganese and iron it come mostly from the anticaking agent which wich is used in some salt brands. The detection if the manganese and iron in this ammount is salt based but this is not bioavailable and mostly after a few days the skimmer take it out

That sounds promising - what is your recommendation when to " repeat " the ICP to confirm? In 2 weeks?