White build-up on heater

[rjrossi88]

I saw this white stuff on my heater a little bit ago and I've never seen it in my tank before. It's only on this heater, but not on the other heater or on anything else. I just did a water change last night so my parameters are all fine. Could it be calcium??

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[Delapool]

Does it rub off? I tend to get calcium more at tank water level so not sure here.

 

[gemach7]

Made me look at my heaters to see if have any lol. I did a PWC on my salt water yesterday and some detritus has deposited on my heater. I suppose after heating this could begin to burn into something similar?


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[rjrossi88]

Does it rub off? I tend to get calcium more at tank water level so not sure here.

I do as well, that's what surprised me when I saw it there. I haven't tried to rub it off yet. I was afraid to spread it in the water without knowing what it could be lol.

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[coralbandit]

If it is soft is more then likely just waste/debris that has settled in a low flow area IMO.
It would not be a fish disease or anything like that if that is what you are worried about.

 

[rjrossi88]

Looks like it went away on its own. Must have just been waste

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