aquanoobie
Member
Hieg. thought my tank may be low on Ni (Nickel) got the water report did the maths and the Ni levels was acceptable
I also know of RO water users who dont add Ni and yet their tanks are fine, maybe its in substrate or excreted in fish waste etc
Nickel is everywhere, in soil, in water, in atmosphere, nickel is almost like pollution. Also in cigaret smoke and in foods cooked in stainless steel pots. Simple aerating brings nickel to tank water, comes with fish food too. Also RO water contains nickel.