Top-off water alkalinity

smoorman1 · 2026-02-25T20:27:53+0000

Do any of you correct the alkalinity to the RODI water before adding fresh top off water.

griss · 2026-02-25T20:45:37+0000

I do not and never have. Well, unless you count occasionally dripping kalkwasser.

Reefing102 · 2026-02-25T23:49:26+0000

I do not. I know plenty of people add kalk but more for dosing purposes than balancing Alk in RODI specific purposes

smoorman1 · 2026-02-26T01:28:19+0000

Will the top off water slowly reduce alkalinity?

griss · 2026-02-26T01:29:22+0000

smoorman1 said:
Will the top off water slowly reduce alkalinity?

It shouldn’t but life will reduce it. Thats why we dose alk, kalk or CA Reactor.

griss · 2026-02-26T01:30:06+0000

For clarification, topoff won’t as long as you’re doing regular water changesz