@Randy Holmes-Farley Would appreciate your input on my dilemma. Thx
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If it is OK for drinking, it is OK for rinsing ordinary solid objects, but not porous rock or sand.
The amount of copper or anything else that can come from traces of left over water are insignificant.
That is not true of high surface area materials, especially those like calcium carbonate which may specifically bind things like copper from the water.
Hello
I’m a newbie to the reef hobby and am currently setting up a large tank system. I recently used tap water to flow and leak test the system. A fellow reefer mentioned that the dead rock I have in the tank may have absorbed trace elements and nutrients for the tap water. Our local tap water uses chlorine and I register about 95 TDS. Any comment or suggestion you have would be appreciated. Thx
Norb
Thank you RandyThe chlorine is no concern. Copper would be my concern. I might run cuprisorb on the system for a bit before adding any delicate animals, then start with some snails and if they do fine, you are good to go (IMO).