lowering alk

[sryder]

my tank water is a 3.0 but my water change water is higher. what is the best way to lower the alk in the changeout water?

 

[Boomer]

How high ? It is very difficult to lower the alk, unless you start using very, very nasty chemicals.........an no-no

 

[quibrzif]

To lower alkalinity of an IO salt (around 15 dKH), I made the mix 1:1 IO and the Kent salt (the bag I bought has alkalinity around 7 dKH).

 

[OldManOfTheSea]

One time I put into the sump the wrong thing by mistake and my ALK went thru the roof because of it and I lowered it with water changes, the old fashion way.

 

[Boomer]

Yes, if one wants to mix salt that is another way.