PH level

I need to raise my ph from 7.6 to 8.4 what is the best way to do this.

 

One thing that helps is to ventilate the room your tank is in. It doesn't seem that it would help, but it does.
From 7.6 to 8.4.... you may still need a pH buffer, but keep a very close eye on your alkalinity since the buffers do tend to up its level.

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Also make sure your circulation pumps are pointed at the water surface to create greater gas exchange.

 

This thread has been moved to the Water Chemistry Forum

 

is it a reef tank? if so using kalk will raise your ph and keep the calcium level up

 

I try to stay away from dkH buffers as most people tend to use it too aggressively and end up making changes in the water chemistry in their tanks too quickly (in my opinion). I generally like to a change in the water chemistry happen very slowly over time. Usually a tank that has a lower dkH than desired took some time to get down there, it usually didn’t happen overnight. Conversely, it’s also not optimum to have it raised to the desired level over night. You can try stronger aeration in the aquarium water to degass excess carbon dioxide. For a permanent fix, I dose my tank with Tropic Marin Bio-Calcium which will very slowly, over time, raise the dkH to the desired level which prevents pH swings in the long term. Using a salt with a naturally higher buffering capacity may also help too.

 

+1, limewater (kalkwasser) is a great way to raise ph, while supplementing ALK and Calcium... You can add it to your auto top off...

Here is a great article on Kalkwasser.

What Your Grandmother Never Told You About Lime by Randy Holmes-Farley - Reefkeeping.com