High nitrates,

[Leeh24]

His may sound like a silly question but it may be the solution to what's been causing my high nitrates.
I have just been to local fish store to buy some r/o do I could a partial water change in my tank.
I thought I would try testing before I did and before I had even finished dropping the 2nd bottle in it was turning red.
I waited 5 mins and nitrates are well over 100.
So my question is should r/o water be nitrate free ??
Lee

 

[BillD]

RO water should be nitrate free.

 

[Grease]

I would take it back n have them test it too. They shouldnt be any in the water.

 

[AquaRick]

The api test kits also expire and can give false readings if used past their intended date.

 

[carey]

I was buying ro/di water from my LFS until I tested it too. it had phosphates and nitrates in it so I immediately stopped buying their water and I spent the $66 on my own unit. LOL

Ro/di should be pure water with nothing reading on any of your tests. No ammonia, trites or trates AT ALL!.

 

[Leeh24]

My api test kit is only a month old. I went to another store and he was great tested his water in front of me and low and behold yellow and no red. I got some from them. When I got back I tested that water just to ensure my kit was ok and I was doing test correct.
And guess what yellow.. I won't go back to the original store Now.