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Hi all,

I'm looking for the best natural substance to put inside a canister filter to raise the PH of my tank. The know the options are coral gravel, limestone etc, but which is the best?

I'm removing my Juwel internal filter and replacing with maybe an Eheim 2260 and I hope to put some sort of buffering compound.

thanks...
 

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not sure but i need the same help to reduce my ph. Since i put coral sand in the tank the ph is alwways around 8.4 and i have to battle to get it lower
 

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essjay said:
I'm looking for the best natural substance to put inside a canister filter to raise the PH of my tank. The know the options are coral gravel, limestone etc, but which is the best?
I have always used crushed coral in my tanks…Works good…

Cardiff said:
. Since i put coral sand in the tank the ph is alwways around 8.4 and i have to battle to get it lower
If you don’t want high PH, why did you use coral substrate?
What kind of fish are you keeping?
 

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Crushed coral will be the cheapest to use. It will raise the pH to about 8.2. One thing to remember is crushed coral will not raise the ph instantly. If the tank has a ph of 7.0 it will take a few days for the ph to raise itself. You also have to consider the PH out of the tap. If its well below the ph in the tank ( say 6.5 out of the tap, and 8.2 in the tank), you will still have to buffer the water during water changes, or you will see a swing in the ph during the changes. The key is consistancy Good Luck
 
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