View Full Version : Adjusting water change pH

06/27/2007, 10:40 AM
I have alot of tanks to do water changes on, and want to know if I can add arm & hammer to the water I'm going to add to the tank to get the pH closer.

All tanks have LR already.

If so is there a artilces of calc I can use? I have 5gal buckets.

06/27/2007, 11:54 AM
What is the pH of the tank and of the new saltwater?

Baking soda will lower the pH a bit, but probably not enough to make a difference. What percentage of water is being changes? If it's 20% or less, I doubt that the pH difference is going to matter.

06/27/2007, 12:13 PM

gauge says 8.0

water is ro/di so 7.0

Put some LR rubble in the water change buckets too. Thought maybe that'd be better

06/27/2007, 02:09 PM
The pH of RO-DI water is irrelevant, since it has no buffering. Are you doing a water change or a topoff?

06/27/2007, 05:33 PM
water change

06/27/2007, 05:38 PM
So the pH of the change water should be set by the salt mix. Have you measured some freshly mixed water? Some salt mixes take a bit of aeration to reach pH equilibrium.