Do I need to dechlorinate water before mix with RO?

wilamzq

New Member
Joined
7 Mar 2019
Messages
17
Location
Sweden
Hey,

As the title indicates I would like to mix my RO water with some tap water (75/25) to increase KH a bit more so and I am wondering, Do I have to dechlorinate the tap water before mix it with the RO?

Thank you
 

Parablennius

Member
Joined
5 Mar 2016
Messages
169
Location
LANCS
Does your tap water have Chloramine or free Chlorine? My supply has free Chlorine which gasses off. As such I prepare my change-water, 40% ish ( Heat, adjust GH etc) the day before and use it the next day untreated. Chloramine, of course, will need pre-treating.
 

wilamzq

New Member
Joined
7 Mar 2019
Messages
17
Location
Sweden
Does your tap water have Chloramine or free Chlorine? My supply has free Chlorine which gasses off. As such I prepare my change-water, 40% ish ( Heat, adjust GH etc) the day before and use it the next day untreated. Chloramine, of course, will need pre-treating.
According to my water provider parameters we have ( Total Chlorine 0.2 ppm, Chloride (Cl-) 20, NH4 0.01 ) and doesn't mention anything for Chloramine or Chlorine..
 
Last edited:

Parablennius

Member
Joined
5 Mar 2016
Messages
169
Location
LANCS
Chloramine is deliberately aimed at "hanging around longer". Utilities supply us with drinking quality water, not fishkeeping water. Can't you do what I did, speak to your supplier directly, ask the question?
 

GlenD

Member
Joined
26 Jun 2019
Messages
161
Location
London
The problem with not adding Prime etc., is if your local water supplier begins to add chloramine into the tapwater you could end up killing your fish before you find out.
 

Similar threads

Top