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re: Ph crashing up?

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. 

Now if the plants are causeing the ph rise, then floating algea/java moss matts that cover a portion of the surface would be suspect.  They account for most of the plant mass in the aquarium.

At 10:56 AM 4/25/03 -0500, you wrote: 
Must be your substrate.  What are you using?  Now I want
your substrate!!!


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