Mg/l = Ppm?

[mnewsholme]

Hi All

Starting my fish less cycle. In sticky thread about cycling it refers to test results in terms of parts per million, PPM. My test kit (maidenhead ) has all results in mg/l. Are these the same thing? Twenty odd years since school chemistry lessons and I'm rusty to say the least

Matt

 

[fluttermoth]

As near as makes no difference, yes

I think there is a technical slight difference between the two, but way beyond the tolerance of our test kits!

 

[mnewsholme]

Thanks for quick answer. Looks like I've got initial ammonia dose about right.

Matt

 

[tunagirll]

parts per million (ppm) is commonly converted straight to milligrams per litre (mgL-1 or mg/L) on a regular basis, and for your purposes are the same thing

 
parts per million in this case is one mg of X per million mg.
 
There happens to be a million mg in one litre of pure water.
 
Therefore one mg of X per litre.