Adding red sea foundation B (alk) liquid to top off water

[lmfbs]

I know you can't add the powder red sea foundation products to RODI water, but can you add the liquid to RODI?

 

[Randy Holmes-Farley Verified Community Expert]

You can add either the alk or the calcium additives (solid or liquid) to top off RO/DI. Not both.

 

[lmfbs]

You can add either the alk or the calcium additives (solid or liquid) to top off RO/DI. Not both.

Oooh so the problem is mixing additives when you're adding them to rodi? Thanks!

 

[Randy Holmes-Farley Verified Community Expert]

Oooh so the problem is mixing additives when you're adding them to rodi? Thanks!

The problem is mixing them in any concentrated solution. You could not add those same levels to tank water either.

One days worth of additives to daily top off is likely 50-100 times more concentrated than adding it to the tank itself (and that's ignoring the alk and calcium already in the tank water).