So after worrying I finally got to the store to buy a copper test kit after I had also used a brass fitting in my ato system and had been fully submersed for over 5 ish months. Pulled the fitting when this thread was first posted and there was definite signs of wear and fading of the original coloration and as a result of this I was scared.
Anywho I tested my RO ato system and it came up 0 as well my tank showed the same readings. Phew I think I may have dodged a bullet here.
I'm off to the store now to buy a coral in celebration lol.
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