re: Ph crashing up?

[Apist-O-Rama <apistorama@fancifulfins.com>]

        I am not sure if the method you are using to test substrate will 
work.  Your best bet is to get some muriatic acid from a hardware 
store.  Put some of the gravel in a cup and pour in some of the muriatic 
acid and watch for a reaction.  Make sure you are in a well vented place!
        Do you have any rocks in your tank? If you do, test them as well.
Eric

At 10:32 AM 4/25/03 -0700, you wrote:
> All I am using of substrate is silica blasting sand I found down at my 
> local home depot.  The front 2/3rds of the tank is just this sand.  The 
> back third is about 3 cups of Flora base substrate covered by plain coated 
> aquarium gravel I picked up at the local petsmart.
>
> I tested the blasting sand for buffering by taking about 5ml of sand, and 
> mixing it with about 2ml of dry Kent ph down (I think is carbonic 
> acid).  I then mixed it with water and watched for a reaction (bubbling, 
> ect..)  There was none.  Therefore I am assuming the sand is inert.  The 
> other substate materials are either coated, or should cause a slight ph fall.

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